diff --git a/backends/imgui_impl_opengl3.cpp b/backends/imgui_impl_opengl3.cpp
index a66b827..9b5d431 100644
--- a/backends/imgui_impl_opengl3.cpp
+++ b/backends/imgui_impl_opengl3.cpp
@@ -25,6 +25,7 @@
 // CHANGELOG
 // (minor and older changes stripped away, please see git history for details)
 //  2026-XX-XX: Platform: Added support for multiple windows via the ImGuiPlatformIO interface.
+//  2026-06-23: OpenGL: GLSL version detection assume GLSL 410 when GL context is 4.1. Fixes an issue running on macOS with Wine. (#9427, #6577)
 //  2026-04-23: OpenGL: Added support for standard draw callbacks (in platform_io): DrawCallback_ResetRenderState, DrawCallback_SetSamplerLinear, DrawCallback_SetSamplerNearest. (#9378)
 //  2026-03-12: OpenGL: Fixed invalid assert in ImGui_ImplOpenGL3_UpdateTexture() if ImTextureID_Invalid is defined to be != 0, which became the default since 2026-03-12. (#9295)
 //  2025-12-11: OpenGL: Fixed embedded loader multiple init/shutdown cycles broken on some platforms. (#8792, #9112)
@@ -1055,7 +1056,10 @@
 #elif defined(__APPLE__)
         glsl_version = "#version 150";
 #else
-        glsl_version = "#version 130";
+        if (bd->GlVersion >= 410)
+            glsl_version = "#version 410";
+        else
+            glsl_version = "#version 130";
 #endif
     }
     IM_ASSERT((int)strlen(glsl_version) + 2 < IM_COUNTOF(bd->GlslVersionString));
diff --git a/docs/CHANGELOG.txt b/docs/CHANGELOG.txt
index 275da06..2f24274 100644
--- a/docs/CHANGELOG.txt
+++ b/docs/CHANGELOG.txt
@@ -41,6 +41,9 @@
 
 Breaking Changes:
 
+- TreeNode: commented out legacy name `ImGuiTreeNodeFlags_SpanTextWidth` which
+  was obsoleted in 1.90.7 (May 2024). Use `ImGuiTreeNodeFlags_SpanLabelWidth`.
+
 Other Changes:
 
 - Windows:
@@ -50,17 +53,31 @@
   - Clicking on a window's empty-space to move/focus a window checks
     for lack of queued focus request. (#9382)
 - InputText:
-  - Added style.InputTextCursorSize to configure cursor/caret thickness. (#7031, #9409)
-    This is automatically scaled by style.ScaleAllSizes().
+  - Added `style.InputTextCursorSize` to configure cursor/caret thickness. (#7031, #9409)
+    This is automatically scaled by `style.ScaleAllSizes()`.
 - Fonts:
   - Added `IMGUI_DISABLE_DEFAULT_FONT_BITMAP`/`IMGUI_DISABLE_DEFAULT_FONT_VECTOR` to
     disable embedding either fonts separately. (#9407)
+  - Tweak `CalcTextSize()` awkward width rounding/ceiling code to reduce floating-point
+    imprecisions altering the result by 1 even at relatively small width. (#791)
+  - Better document the fact that ImFontAtlas::Clear()/ClearFonts() functions are
+    unlikely to be useful nowadays. Better recover to an edge case of mistakenly
+    calling ClearFonts() during rendering.
+  - Fixed an issue where passing a manually created ImFontAtlas to CreateContext() would
+    incorrectly destroy it in DestroyContext() when ref-count gets back to zero. (#9426)
 - DrawList:
-  - Minor optimization to AddLine(), AddLineH(), AddLineV() functions. (#4091)
+  - Minor optimization to `AddLine()`, `AddLineH()`, `AddLineV()` functions. (#4091)
+  - Added `ImDrawListFlags_TextNoPixelSnap` to disable snapping of AddText()
+    coordinates for a given scope. (#3437, #9417, #2291)
+- ColorButton:
+  - Small rendering tweak/optimization for the alpha checkerboard.
 - Demo:
   - Extract 'Widgets->Tree Nodes->Selectable Nodes' out of the 'Advanced'
     demo for clarity (manual reimplementation of basic selection).
 - Backends:
+  - OpenGL3:
+    - GLSL version detection assume GLSL 410 when GL context is 4.1.
+      Fixes an issue running on macOS with Wine. [#9427, #6577) [@perminovVS]
   - Win32:
     - Uses `SetProcessDpiAwarenessContext()` instead of `SetThreadDpiAwarenessContext()`
       when available, fixing OpenGL DPI scaling issues as e.g. NVIDIA drivers tends
diff --git a/docs/FONTS.md b/docs/FONTS.md
index 1e51cde..ac93bca 100644
--- a/docs/FONTS.md
+++ b/docs/FONTS.md
@@ -77,6 +77,17 @@
   You can use the `ImFontGlyphRangesBuilder` for this purpose and rebuilding your atlas between frames when new characters are needed. This will be the biggest win!
 - Set `io.Fonts.Flags |= ImFontAtlasFlags_NoPowerOfTwoHeight;` to disable rounding the texture height to the next power of two.
 
+### (5) Reduce texture resizes/copy on startup
+
+🆕 Since 1.92, the ImFontAtlas is initially created using a 512x128 texture, then grows as glyphs and fonts are used. Atlas growth leads to alloc+copy, and both the old and new sized textures are present in memory for a short time (typically one frame). If you use known fonts and want to reduce initial growth, you may set `TexMinWidth` and `TexMinHeight` during initializaton.
+
+```cpp
+ImFontAtlas* atlas = io.Fonts;
+atlas->TexMinWidth = 1024;
+atlas->TexMinHeight = 1024;
+atlas->AddFont(...);
+```
+
 ##### [Return to Index](#index)
 
 ---------------------------------------
diff --git a/docs/README.md b/docs/README.md
index 283dd47..cc73e28 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -43,7 +43,7 @@
 
 **Backends for a variety of graphics API and rendering platforms** are provided in the [backends/](https://github.com/ocornut/imgui/tree/master/backends) folder, along with example applications in the [examples/](https://github.com/ocornut/imgui/tree/master/examples) folder. You may also create your own backend. Anywhere where you can render textured triangles, you can render Dear ImGui.
 
-C++20 users wishing to use a module may the use [stripe2933/imgui-module](https://github.com/stripe2933/imgui-module) third-party extension.
+C++20 users wishing to use a module may use the [stripe2933/imgui-module](https://github.com/stripe2933/imgui-module) third-party extension.
 
 See the [Getting Started & Integration](#getting-started--integration) section of this document for more details.
 
diff --git a/examples/example_glfw_wgpu/CMakeLists.txt b/examples/example_glfw_wgpu/CMakeLists.txt
index 95d9fe3..287a89d 100644
--- a/examples/example_glfw_wgpu/CMakeLists.txt
+++ b/examples/example_glfw_wgpu/CMakeLists.txt
@@ -14,7 +14,7 @@
 #   * build/example_glfw_wgpu[.exe] or build/Debug/example_glfw_wgpu[.exe]
 
 # Building for desktop with WGVK (MUCH EASIER)
-#  1. git clone https://github.com/manuel5975p/WGVK dawn
+#  1. git clone https://github.com/manuel5975p/WGVK wgvk
 #  2. cmake -B build -DIMGUI_WGVK_DIR=wgvk
 #  3. cmake --build build
 # The resulting binary will be found at one of the following locations:
diff --git a/examples/example_sdl2_wgpu/CMakeLists.txt b/examples/example_sdl2_wgpu/CMakeLists.txt
index aa8a1e5..efe35ff 100644
--- a/examples/example_sdl2_wgpu/CMakeLists.txt
+++ b/examples/example_sdl2_wgpu/CMakeLists.txt
@@ -14,7 +14,7 @@
 #   * build/example_sdl2_wgpu[.exe] or build/Debug/example_sdl2_wgpu[.exe]
 
 # Building for desktop with WGVK (MUCH EASIER)
-#  1. git clone https://github.com/manuel5975p/WGVK dawn
+#  1. git clone https://github.com/manuel5975p/WGVK wgvk
 #  2. cmake -B build -DIMGUI_WGVK_DIR=wgvk
 #  3. cmake --build build
 # The resulting binary will be found at one of the following locations:
diff --git a/examples/example_sdl3_wgpu/CMakeLists.txt b/examples/example_sdl3_wgpu/CMakeLists.txt
index 7ecf026..dd7b1e4 100644
--- a/examples/example_sdl3_wgpu/CMakeLists.txt
+++ b/examples/example_sdl3_wgpu/CMakeLists.txt
@@ -14,7 +14,7 @@
 #   * build/example_sdl3_wgpu[.exe] or build/Debug/example_sdl3_wgpu[.exe]
 
 # Building for desktop with WGVK (MUCH EASIER)
-#  1. git clone https://github.com/manuel5975p/WGVK dawn
+#  1. git clone https://github.com/manuel5975p/WGVK wgvk
 #  2. cmake -B build -DIMGUI_WGVK_DIR=wgvk
 #  3. cmake --build build
 # The resulting binary will be found at one of the following locations:
diff --git a/imgui.cpp b/imgui.cpp
index c3e0770..b1d3c85 100644
--- a/imgui.cpp
+++ b/imgui.cpp
@@ -402,6 +402,7 @@
                             you may use GetMainViewport()->Pos to offset hard-coded positions, e.g. SetNextWindowPos(GetMainViewport()->Pos)
                           - likewise io.MousePos and GetMousePos() will use OS coordinates.
                             If you query mouse positions to interact with non-imgui coordinates you will need to offset them, e.g. subtract GetWindowViewport()->Pos.
+ - 2026/06/02 (1.92.9) - TreeNode: commented out legacy name ImGuiTreeNodeFlags_SpanTextWidth which was obsoleted in 1.90.7 (May 2024). Use ImGuiTreeNodeFlags_SpanLabelWidth instead.
  - 2026/05/07 (1.92.8) - DrawList: swapped the last two arguments of AddRect(), AddPolyline(), PathStroke().
                          - Before: void ImDrawList::AddRect(ImVec2 p_min, ImVec2 p_max, ImU32 col, float rounding = 0.0f, ImDrawFlags flags = 0, float thickness = 1.0f);
                          - After:  void ImDrawList::AddRect(ImVec2 p_min, ImVec2 p_max, ImU32 col, float rounding = 0.0f, float thickness = 1.0f, ImDrawFlags flags = 0);
@@ -4574,7 +4575,7 @@
     for (ImFontAtlas* atlas : g.FontAtlases)
     {
         UnregisterFontAtlas(atlas);
-        if (atlas->RefCount == 0)
+        if (atlas->RefCount == 0 && atlas->OwnerContext == &g)
         {
             atlas->Locked = false;
             IM_DELETE(atlas);
@@ -6454,11 +6455,9 @@
     ImVec2 text_size = font->CalcTextSizeA(font_size, FLT_MAX, wrap_width, text, text_display_end, NULL);
 
     // Round
-    // FIXME: This has been here since Dec 2015 (7b0bf230) but down the line we want this out.
-    // FIXME: Investigate using ceilf or e.g.
-    // - https://git.musl-libc.org/cgit/musl/tree/src/math/ceilf.c
-    // - https://embarkstudios.github.io/rust-gpu/api/src/libm/math/ceilf.rs.html
-    text_size.x = IM_TRUNC(text_size.x + 0.99999f);
+    // (see 7b0bf230, 4622fa4b6, #791 for details about this.)
+    // FIXME: Add a way to disable this.
+    text_size.x = ImCeilFast(text_size.x);
 
     return text_size;
 }
diff --git a/imgui.h b/imgui.h
index 9a3d461..1fa4a10 100644
--- a/imgui.h
+++ b/imgui.h
@@ -30,7 +30,7 @@
 // Library Version
 // (Integer encoded as XYYZZ for use in #if preprocessor conditionals, e.g. '#if IMGUI_VERSION_NUM >= 12345')
 #define IMGUI_VERSION       "1.92.9 WIP"
-#define IMGUI_VERSION_NUM   19281
+#define IMGUI_VERSION_NUM   19282
 #define IMGUI_HAS_TABLE             // Added BeginTable() - from IMGUI_VERSION_NUM >= 18000
 #define IMGUI_HAS_TEXTURES          // Added ImGuiBackendFlags_RendererHasTextures - from IMGUI_VERSION_NUM >= 19198
 #define IMGUI_HAS_VIEWPORT          // In 'docking' WIP branch.
@@ -1378,7 +1378,7 @@
 
 #ifndef IMGUI_DISABLE_OBSOLETE_FUNCTIONS
     ImGuiTreeNodeFlags_NavLeftJumpsBackHere = ImGuiTreeNodeFlags_NavLeftJumpsToParent,  // Renamed in 1.92.0
-    ImGuiTreeNodeFlags_SpanTextWidth        = ImGuiTreeNodeFlags_SpanLabelWidth,        // Renamed in 1.90.7
+    //ImGuiTreeNodeFlags_SpanTextWidth      = ImGuiTreeNodeFlags_SpanLabelWidth,        // Renamed in 1.90.7
     //ImGuiTreeNodeFlags_AllowItemOverlap   = ImGuiTreeNodeFlags_AllowOverlap,          // Renamed in 1.89.7
 #endif
 };
@@ -2725,7 +2725,7 @@
     //void*     ImeWindowHandle;                    // [Obsoleted in 1.87] Set ImGuiViewport::PlatformHandleRaw instead. Set this to your HWND to get automatic IME cursor positioning.
 
 #ifndef IMGUI_DISABLE_OBSOLETE_FUNCTIONS
-    float       FontGlobalScale;                    // Moved io.FontGlobalScale to style.FontScaleMain in 1.92 (June 2025)
+    float       FontGlobalScale;                    // Moved io.FontGlobalScale to style.FontScaleMain in 1.92.0 (June 2025)
 
     // Legacy: before 1.91.1, clipboard functions were stored in ImGuiIO instead of ImGuiPlatformIO.
     // As this is will affect all users of custom engines/backends, we are providing proper legacy redirection (will obsolete).
@@ -3413,6 +3413,7 @@
     ImDrawListFlags_AntiAliasedLinesUseTex  = 1 << 1,  // Enable anti-aliased lines/borders using textures when possible. Require backend to render with bilinear filtering (NOT point/nearest filtering).
     ImDrawListFlags_AntiAliasedFill         = 1 << 2,  // Enable anti-aliased edge around filled shapes (rounded rectangles, circles).
     ImDrawListFlags_AllowVtxOffset          = 1 << 3,  // Can emit 'VtxOffset > 0' to allow large meshes. Set when 'ImGuiBackendFlags_RendererHasVtxOffset' is enabled.
+    ImDrawListFlags_TextNoPixelSnap         = 1 << 4,  // Disable automatically snapping AddText() calls to pixel boundaries.
 };
 
 // Draw command list
@@ -3564,8 +3565,8 @@
     inline    void  PushTextureID(ImTextureRef tex_ref) { PushTexture(tex_ref); }   // RENAMED in 1.92.0
     inline    void  PopTextureID()                      { PopTexture(); }           // RENAMED in 1.92.0
 #else
-    IMGUI_API void  AddRect(const ImVec2& p_min, const ImVec2& p_max, ImU32 col, float rounding /*= 0.0f*/, ImDrawFlags flags /*= 0*/, float thickness /*= 1.0f*/) = delete;
-    IMGUI_API void  AddPolyline(const ImVec2* points, int num_points, ImU32 col, ImDrawFlags flags, float thickness) = delete;
+              void  AddRect(const ImVec2& p_min, const ImVec2& p_max, ImU32 col, float rounding /*= 0.0f*/, ImDrawFlags flags /*= 0*/, float thickness /*= 1.0f*/) = delete;
+              void  AddPolyline(const ImVec2* points, int num_points, ImU32 col, ImDrawFlags flags, float thickness) = delete;
     inline    void  PathStroke(ImU32 col, ImDrawFlags flags /*= 0*/, float thickness /*= 1.0f*/) = delete;
 #endif
     //inline  void  AddEllipse(const ImVec2& center, float radius_x, float radius_y, ImU32 col, float rot = 0.0f, int num_segments = 0, float thickness = 1.0f) { AddEllipse(center, ImVec2(radius_x, radius_y), col, rot, num_segments, thickness); } // OBSOLETED in 1.90.5 (Mar 2024)
@@ -3678,7 +3679,7 @@
     bool                WantDestroyNextFrame;   // rw   -   // [Internal] Queued to set ImTextureStatus_WantDestroy next frame. May still be used in the current frame.
 
     // Functions
-    // - If GetPixels() functions asserts while being called by your render loop, it could be caused by calling ImFontAtlas::Clear() instead of ClearFonts()?
+    // - If GetPixels() functions asserts while being called by your render loop, it could be caused by calling ImFontAtlas::Clear()/ClearFonts()?
     ImTextureData()     { memset((void*)this, 0, sizeof(*this)); Status = ImTextureStatus_Destroyed; TexID = ImTextureID_Invalid; }
     ~ImTextureData()    { DestroyPixels(); }
     IMGUI_API void      Create(ImTextureFormat format, int w, int h);
@@ -3832,14 +3833,16 @@
     IMGUI_API ImFont*           AddFontFromMemoryTTF(void* font_data, int font_data_size, float size_pixels = 0.0f, const ImFontConfig* font_cfg = NULL, const ImWchar* glyph_ranges = NULL); // Note: Transfer ownership of 'ttf_data' to ImFontAtlas! Will be deleted after destruction of the atlas. Set font_cfg->FontDataOwnedByAtlas=false to keep ownership of your data and it won't be freed.
     IMGUI_API ImFont*           AddFontFromMemoryCompressedTTF(const void* compressed_font_data, int compressed_font_data_size, float size_pixels = 0.0f, const ImFontConfig* font_cfg = NULL, const ImWchar* glyph_ranges = NULL); // 'compressed_font_data' still owned by caller. Compress with binary_to_compressed_c.cpp.
     IMGUI_API ImFont*           AddFontFromMemoryCompressedBase85TTF(const char* compressed_font_data_base85, float size_pixels = 0.0f, const ImFontConfig* font_cfg = NULL, const ImWchar* glyph_ranges = NULL);              // 'compressed_font_data_base85' still owned by caller. Compress with binary_to_compressed_c.cpp with -base85 parameter.
-    IMGUI_API void              RemoveFont(ImFont* font);
-
-    IMGUI_API void              Clear();                    // Clear everything (fonts + textures). Don't call mid-frame!
-    IMGUI_API void              ClearFonts();               // Clear input+output font data/glyphs. You can call this mid-frame if you load new fonts afterwards!
-    IMGUI_API void              CompactCache();             // Compact cached glyphs and texture.
+    IMGUI_API void              RemoveFont(ImFont* font);                       // Remove a font
+    IMGUI_API void              CompactCache();                                 // Compact cached glyphs and texture.
     IMGUI_API void              SetFontLoader(const ImFontLoader* font_loader); // Change font loader at runtime.
 
-    // As we are transitioning toward a new font system, we expect to obsolete those soon:
+    // Clearing the atlas/fonts has little use nowadays, unless you want to batch remove all fonts. 
+    // - Since 1.92, you can call ClearFonts() mid-frame, if you load new fonts afterwards. 
+    // - As we are transitioning toward our new font system the semantic for those functions gets increasingly misleading and are often a source of issues.
+    //   TL;DR; most likely, don't use any of those functions. We expect to obsolete/rework them.
+    IMGUI_API void              Clear();                    // Clear everything (fonts + textures). Don't call mid-frame!
+    IMGUI_API void              ClearFonts();               // Clear input+output font data/glyphs. New fonts and textures will be recreated afterwards.
     IMGUI_API void              ClearInputData();           // [OBSOLETE] Clear input data (all ImFontConfig structures including sizes, TTF data, glyph ranges, etc.) = all the data used to build the texture and fonts.
     IMGUI_API void              ClearTexData();             // [OBSOLETE] Clear CPU-side copy of the texture data. Saves RAM once the texture has been copied to graphics memory.
 
@@ -4058,7 +4061,7 @@
     IMGUI_API void              RenderChar(ImDrawList* draw_list, float size, const ImVec2& pos, ImU32 col, ImWchar c, const ImVec4* cpu_fine_clip = NULL);
     IMGUI_API void              RenderText(ImDrawList* draw_list, float size, const ImVec2& pos, ImU32 col, const ImVec4& clip_rect, const char* text_begin, const char* text_end, float wrap_width = 0.0f, ImDrawTextFlags flags = 0);
 #ifndef IMGUI_DISABLE_OBSOLETE_FUNCTIONS
-    inline const char*          CalcWordWrapPositionA(float scale, const char* text, const char* text_end, float wrap_width) { return CalcWordWrapPosition(LegacySize * scale, text, text_end, wrap_width); }
+    inline const char*          CalcWordWrapPositionA(float scale, const char* text, const char* text_end, float wrap_width) { return CalcWordWrapPosition(LegacySize * scale, text, text_end, wrap_width); } // Obsoleted old name in 1.92.0. Note how `scale` was to `size`.
 #endif
 
     // [Internal] Don't use!
diff --git a/imgui_demo.cpp b/imgui_demo.cpp
index fdd1fe2..eccd824 100644
--- a/imgui_demo.cpp
+++ b/imgui_demo.cpp
@@ -4207,7 +4207,7 @@
         ImGui::BeginDisabled();
         ImGui::Button("Disabled item", sz);
         if (ImGui::IsItemHovered(ImGuiHoveredFlags_ForTooltip))
-            ImGui::SetTooltip("I am a a tooltip for a disabled item.");
+            ImGui::SetTooltip("I am a tooltip for a disabled item.");
         ImGui::EndDisabled();
 
         ImGui::TreePop();
diff --git a/imgui_draw.cpp b/imgui_draw.cpp
index 19e7439..4dc5f90 100644
--- a/imgui_draw.cpp
+++ b/imgui_draw.cpp
@@ -408,7 +408,6 @@
         const float a = ((float)i * 2 * IM_PI) / (float)IM_COUNTOF(ArcFastVtx);
         ArcFastVtx[i] = ImVec2(ImCos(a), ImSin(a));
     }
-    ArcFastRadiusCutoff = IM_DRAWLIST_CIRCLE_AUTO_SEGMENT_CALC_R(IM_DRAWLIST_ARCFAST_SAMPLE_MAX, CircleSegmentMaxError);
 }
 
 ImDrawListSharedData::~ImDrawListSharedData()
@@ -418,17 +417,17 @@
 
 void ImDrawListSharedData::SetCircleTessellationMaxError(float max_error)
 {
-    if (CircleSegmentMaxError == max_error)
+    if (CircleTessellationMaxError == max_error)
         return;
 
     IM_ASSERT(max_error > 0.0f);
-    CircleSegmentMaxError = max_error;
+    CircleTessellationMaxError = max_error;
     for (int i = 0; i < IM_COUNTOF(CircleSegmentCounts); i++)
     {
         const float radius = (float)i;
-        CircleSegmentCounts[i] = (ImU8)((i > 0) ? IM_DRAWLIST_CIRCLE_AUTO_SEGMENT_CALC(radius, CircleSegmentMaxError) : IM_DRAWLIST_ARCFAST_SAMPLE_MAX);
+        CircleSegmentCounts[i] = (ImU8)((i > 0) ? IM_DRAWLIST_CIRCLE_AUTO_SEGMENT_CALC(radius, CircleTessellationMaxError) : IM_DRAWLIST_ARCFAST_SAMPLE_MAX);
     }
-    ArcFastRadiusCutoff = IM_DRAWLIST_CIRCLE_AUTO_SEGMENT_CALC_R(IM_DRAWLIST_ARCFAST_SAMPLE_MAX, CircleSegmentMaxError);
+    ArcFastRadiusCutoff = IM_DRAWLIST_CIRCLE_AUTO_SEGMENT_CALC_R(IM_DRAWLIST_ARCFAST_SAMPLE_MAX, CircleTessellationMaxError);
 }
 
 ImDrawList::ImDrawList(ImDrawListSharedData* shared_data)
@@ -662,11 +661,11 @@
 int ImDrawList::_CalcCircleAutoSegmentCount(float radius) const
 {
     // Automatic segment count
-    const int radius_idx = (int)(radius + 0.999999f); // ceil to never reduce accuracy
+    const int radius_idx = (int)(radius + 0.999f); // ceil to never reduce accuracy
     if (radius_idx >= 0 && radius_idx < IM_COUNTOF(_Data->CircleSegmentCounts))
         return _Data->CircleSegmentCounts[radius_idx]; // Use cached value
     else
-        return IM_DRAWLIST_CIRCLE_AUTO_SEGMENT_CALC(radius, _Data->CircleSegmentMaxError);
+        return IM_DRAWLIST_CIRCLE_AUTO_SEGMENT_CALC(radius, _Data->CircleTessellationMaxError);
 }
 
 // Render-level scissoring. This is passed down to your render function but not used for CPU-side coarse clipping. Prefer using higher-level ImGui::PushClipRect() to affect logic (hit-testing and widget culling)
@@ -2697,6 +2696,7 @@
 // Calling this mid-frame will discard the CPU-side copy of the texture data which is generally unreliable as you may have textures queued for creation or updates.
 void ImFontAtlas::Clear()
 {
+    IMGUI_DEBUG_LOG_FONT("[font] ImFontAtlas::Clear()\n");
     bool backup_renderer_has_textures = RendererHasTextures;
     RendererHasTextures = false; // Full Clear() is supported, but ClearTexData() only isn't.
     ClearFonts();
@@ -2707,6 +2707,7 @@
 void ImFontAtlas::ClearFonts()
 {
     // FIXME-NEWATLAS: Illegal to remove currently bound font.
+    IMGUI_DEBUG_LOG_FONT("[font] ImFontAtlas::ClearFonts()\n");
     IM_ASSERT(!Locked && "Cannot modify a locked ImFontAtlas!");
     for (ImFont* font : Fonts)
         ImFontAtlasBuildNotifySetFont(this, font, NULL);
@@ -2782,6 +2783,28 @@
     IM_ASSERT(atlas->Builder == NULL || atlas->Builder->FrameCount < frame_count); // Protection against being called twice.
     atlas->RendererHasTextures = renderer_has_textures;
 
+    // Update texture status and discard old textures.
+    // (we do this first thing to handle an edge case: if user mistakenly calls ClearFonts()+SetStatus(OK) during
+    //  rendering, it would ImFontAtlasBuildMain() rebuilding before tex->Updates[] gets a chance to be cleared)
+    // (if somehow we need to move this back lower in the function, we could manually call the code to clear Updates[]).
+    for (int tex_n = 0; tex_n < atlas->TexList.Size; tex_n++)
+    {
+        // Update and remove if requested
+        ImTextureData* tex = atlas->TexList[tex_n];
+        if (tex->Status == ImTextureStatus_WantCreate && atlas->RendererHasTextures)
+            IM_ASSERT(tex->TexID == ImTextureID_Invalid && tex->BackendUserData == NULL && "Backend set texture's TexID/BackendUserData but did not update Status to OK.");
+
+        bool remove_from_list = ImTextureDataUpdateNewFrame(tex);
+        if (remove_from_list)
+        {
+            IM_ASSERT(atlas->TexData != tex);
+            tex->DestroyPixels();
+            IM_DELETE(tex);
+            atlas->TexList.erase(atlas->TexList.begin() + tex_n);
+            tex_n--;
+        }
+    }
+
     // Check that font atlas was built or backend support texture reload in which case we can build now
     if (atlas->RendererHasTextures)
     {
@@ -2821,25 +2844,6 @@
         builder->BakedPool.Size -= builder->BakedDiscardedCount;
         builder->BakedDiscardedCount = 0;
     }
-
-    // Update texture status
-    for (int tex_n = 0; tex_n < atlas->TexList.Size; tex_n++)
-    {
-        // Update and remove if requested
-        ImTextureData* tex = atlas->TexList[tex_n];
-        if (tex->Status == ImTextureStatus_WantCreate && atlas->RendererHasTextures)
-            IM_ASSERT(tex->TexID == ImTextureID_Invalid && tex->BackendUserData == NULL && "Backend set texture's TexID/BackendUserData but did not update Status to OK.");
-
-        bool remove_from_list = ImTextureDataUpdateNewFrame(tex);
-        if (remove_from_list)
-        {
-            IM_ASSERT(atlas->TexData != tex);
-            tex->DestroyPixels();
-            IM_DELETE(tex);
-            atlas->TexList.erase(atlas->TexList.begin() + tex_n);
-            tex_n--;
-        }
-    }
 }
 
 bool ImTextureDataUpdateNewFrame(ImTextureData* tex)
@@ -5770,8 +5774,13 @@
     if (glyph->Colored)
         col |= ~IM_COL32_A_MASK;
     float scale = (size >= 0.0f) ? (size / baked->Size) : 1.0f;
-    float x = IM_TRUNC(pos.x);
-    float y = IM_TRUNC(pos.y);
+    float x = pos.x;
+    float y = pos.y;
+    if ((draw_list->Flags & ImDrawListFlags_TextNoPixelSnap) == 0)
+    {
+        x = IM_TRUNC(x);
+        y = IM_TRUNC(y);
+    }
 
     float x1 = x + glyph->X0 * scale;
     float x2 = x + glyph->X1 * scale;
@@ -5803,12 +5812,17 @@
 // DO NOT CALL DIRECTLY THIS WILL CHANGE WILDLY IN 2026. Use ImDrawList::AddText().
 void ImFont::RenderText(ImDrawList* draw_list, float size, const ImVec2& pos, ImU32 col, const ImVec4& clip_rect, const char* text_begin, const char* text_end, float wrap_width, ImDrawTextFlags flags)
 {
-    // Align to be pixel perfect
 begin:
-    float x = IM_TRUNC(pos.x);
-    float y = IM_TRUNC(pos.y);
+    // Align to be pixel perfect
+    float x = pos.x;
+    float y = pos.y;
     if (y > clip_rect.w)
         return;
+    if ((draw_list->Flags & ImDrawListFlags_TextNoPixelSnap) == 0)
+    {
+        x = IM_TRUNC(x);
+        y = IM_TRUNC(y);
+    }
 
     if (!text_end)
         text_end = text_begin + ImStrlen(text_begin); // ImGui:: functions generally already provides a valid text_end, so this is merely to handle direct calls.
@@ -6203,8 +6217,8 @@
         flags = ImDrawFlags_RoundCornersDefault_;
     if (((col & IM_COL32_A_MASK) >> IM_COL32_A_SHIFT) < 0xFF)
     {
-        ImU32 col_bg1 = GetColorU32(ImAlphaBlendColors(IM_COL32(204, 204, 204, 255), col));
-        ImU32 col_bg2 = GetColorU32(ImAlphaBlendColors(IM_COL32(128, 128, 128, 255), col));
+        ImU32 col_bg1 = GetColorU32(ImAlphaBlendColors(IM_COL32(128, 128, 128, 255), col));
+        ImU32 col_bg2 = GetColorU32(ImAlphaBlendColors(IM_COL32(204, 204, 204, 255), col));
         draw_list->AddRectFilled(p_min, p_max, col_bg1, rounding, flags);
 
         int yi = 0;
@@ -6213,12 +6227,12 @@
             float y1 = ImClamp(y, p_min.y, p_max.y), y2 = ImMin(y + grid_step, p_max.y);
             if (y2 <= y1)
                 continue;
-            for (float x = p_min.x + grid_off.x + (yi & 1) * grid_step; x < p_max.x; x += grid_step * 2.0f)
+            for (float x = p_min.x + grid_off.x + ((yi ^ 1)  & 1) * grid_step; x < p_max.x; x += grid_step * 2.0f)
             {
                 float x1 = ImClamp(x, p_min.x, p_max.x), x2 = ImMin(x + grid_step, p_max.x);
                 if (x2 <= x1)
                     continue;
-                ImDrawFlags cell_flags = ImDrawFlags_RoundCornersNone;
+                ImDrawFlags cell_flags = ImDrawFlags_RoundCornersNone; // FIXME: Could use CalcRoundingFlagsForRectInRect()
                 if (y1 <= p_min.y) { if (x1 <= p_min.x) cell_flags |= ImDrawFlags_RoundCornersTopLeft; if (x2 >= p_max.x) cell_flags |= ImDrawFlags_RoundCornersTopRight; }
                 if (y2 >= p_max.y) { if (x1 <= p_min.x) cell_flags |= ImDrawFlags_RoundCornersBottomLeft; if (x2 >= p_max.x) cell_flags |= ImDrawFlags_RoundCornersBottomRight; }
 
diff --git a/imgui_internal.h b/imgui_internal.h
index cdd5b2d..e1ddd5d 100644
--- a/imgui_internal.h
+++ b/imgui_internal.h
@@ -542,6 +542,7 @@
 inline ImVec2 ImFloor(const ImVec2& v)                                  { return ImVec2(ImFloor(v.x), ImFloor(v.y)); }
 inline float  ImTrunc64(float f)                                        { return (float)(ImS64)(f); }
 inline float  ImRound64(float f)                                        { return (float)(ImS64)(f + 0.5f); } // FIXME: Positive values only.
+inline float  ImCeilFast(float f)                                       { int i = (int)f; return (float)(i + (f > (float)i)); } // Consider using the the bit-hack version (search for "0x1p120f").
 inline int    ImModPositive(int a, int b)                               { return (a + b) % b; }
 inline float  ImDot(const ImVec2& a, const ImVec2& b)                   { return a.x * b.x + a.y * b.y; }
 inline ImVec2 ImRotate(const ImVec2& v, float cos_a, float sin_a)       { return ImVec2(v.x * cos_a - v.y * sin_a, v.x * sin_a + v.y * cos_a); }
@@ -883,7 +884,7 @@
     float           FontSize;                   // Current font size (used for for simplified AddText overload)
     float           FontScale;                  // Current font scale (== FontSize / Font->FontSize)
     float           CurveTessellationTol;       // Tessellation tolerance when using PathBezierCurveTo()
-    float           CircleSegmentMaxError;      // Number of circle segments to use per pixel of radius for AddCircle() etc
+    float           CircleTessellationMaxError; // Number of circle segments to use per pixel of radius for AddCircle() etc
     float           InitialFringeScale;         // Initial scale to apply to AA fringe
     ImDrawListFlags InitialFlags;               // Initial flags at the beginning of the frame (it is possible to alter flags on a per-drawlist basis afterwards)
     ImVec4          ClipRectFullscreen;         // Value for PushClipRectFullscreen()
diff --git a/imgui_widgets.cpp b/imgui_widgets.cpp
index 253d9eb..2bf0825 100644
--- a/imgui_widgets.cpp
+++ b/imgui_widgets.cpp
@@ -1755,14 +1755,14 @@
     const float separator_thickness = style.SeparatorTextBorderSize;
     const ImVec2 min_size(label_size.x + extra_w + padding.x * 2.0f, ImMax(label_size.y + padding.y * 2.0f, separator_thickness));
     const ImRect bb(pos, ImVec2(window->WorkRect.Max.x, pos.y + min_size.y));
-    const float text_baseline_y = ImTrunc((bb.GetHeight() - label_size.y) * style.SeparatorTextAlign.y + 0.99999f); //ImMax(padding.y, ImTrunc((style.SeparatorTextSize - label_size.y) * 0.5f));
+    const float text_baseline_y = ImTrunc((bb.GetHeight() - label_size.y) * style.SeparatorTextAlign.y + 0.999f); //ImMax(padding.y, ImTrunc((style.SeparatorTextSize - label_size.y) * 0.5f));
     ItemSize(min_size, text_baseline_y);
     if (!ItemAdd(bb, id))
         return;
 
     const float sep1_x1 = pos.x;
     const float sep2_x2 = bb.Max.x;
-    const float seps_y = ImTrunc((bb.Min.y + bb.Max.y) * 0.5f + 0.99999f);
+    const float seps_y = ImTrunc((bb.Min.y + bb.Max.y) * 0.5f + 0.999f);
 
     const float label_avail_w = ImMax(0.0f, sep2_x2 - sep1_x1 - padding.x * 2.0f);
     const ImVec2 label_pos(pos.x + padding.x + ImMax(0.0f, (label_avail_w - label_size.x - extra_w) * style.SeparatorTextAlign.x), pos.y + text_baseline_y); // FIXME-ALIGN
@@ -8959,7 +8959,7 @@
         // Tooltip on hover
         if (hovered && inner_bb.Contains(g.IO.MousePos))
         {
-            const float t = ImClamp((g.IO.MousePos.x - inner_bb.Min.x) / (inner_bb.Max.x - inner_bb.Min.x), 0.0f, 0.9999f);
+            const float t = ImClamp((g.IO.MousePos.x - inner_bb.Min.x) / (inner_bb.Max.x - inner_bb.Min.x), 0.0f, 0.999f);
             const int v_idx = (int)(t * item_count);
             IM_ASSERT(v_idx >= 0 && v_idx < values_count);
 
@@ -10998,13 +10998,9 @@
     IM_UNUSED(flags);
     IM_ASSERT(width > 0.0f);
     const float rounding = ImMax(0.0f, ImMin((flags & ImGuiTabItemFlags_Button) ? g.Style.FrameRounding : g.Style.TabRounding, width * 0.5f - 1.0f));
-    const float y1 = bb.Min.y + 1.0f;
+    const float y1 = bb.Min.y + 1.0f; // Leave a bit of room in title bars.
     const float y2 = bb.Max.y - g.Style.TabBarBorderSize;
-    draw_list->PathLineTo(ImVec2(bb.Min.x, y2));
-    draw_list->PathArcToFast(ImVec2(bb.Min.x + rounding, y1 + rounding), rounding, 6, 9);
-    draw_list->PathArcToFast(ImVec2(bb.Max.x - rounding, y1 + rounding), rounding, 9, 12);
-    draw_list->PathLineTo(ImVec2(bb.Max.x, y2));
-    draw_list->PathFillConvex(col);
+    draw_list->AddRectFilled(bb.Min, ImVec2(bb.Max.x, y2), col, rounding, ImDrawFlags_RoundCornersTop);
     if (g.Style.TabBorderSize > 0.0f)
     {
         draw_list->PathLineTo(ImVec2(bb.Min.x + 0.5f, y2));