docs/CHANGES: Mention slight rendering changes.
Suggested by Ben.
diff --git a/docs/CHANGES b/docs/CHANGES
index 16acfd7..10cad43 100644
--- a/docs/CHANGES
+++ b/docs/CHANGES
@@ -75,7 +75,10 @@
- The experimental 'warp' mode (AF_CONFIG_OPTION_USE_WARPER) for the
auto-hinter has been removed.
- - The smooth rasterizer performance has been improved by >10%.
+ - The smooth rasterizer performance has been improved by >10%. Note
+ that due to necessary code changes there might be very subtle
+ differences in rendering. They are not visible by the eye,
+ however.
- PCF bitmap fonts compressed with LZW (these are usually files with
the extension `.pcf.Z`) are now handled correctly.
