Document previous bug fix.
diff --git a/docs/CHANGES b/docs/CHANGES
index 7f3c3d7..113fbdf 100644
--- a/docs/CHANGES
+++ b/docs/CHANGES
@@ -1,6 +1,15 @@
CHANGES BETWEEN 2.6 and 2.6.1
- I. IMPORTANT CHANGES
+ I. IMPORTANT BUG FIXES
+
+ - It turned out that for CFFs only the advance widths should be
+ taken from the `htmx', not the side bearings. This bug,
+ introduced in version 2.6.0, makes it necessary to upgrade if
+ you are using CFFs; otherwise you get cropped glyphs with GUI
+ interfaces like GTK or Qt.
+
+
+ II. IMPORTANT CHANGES
- The header file layout has been changed (again), moving all
header files except `ft2build.h' into a subdirectory tree.