diff -r dee5afe5301f -r 3f74d0d4af4c src/corelib/tools/qchar.cpp
--- a/src/corelib/tools/qchar.cpp	Mon Mar 15 12:43:09 2010 +0200
+++ b/src/corelib/tools/qchar.cpp	Thu Apr 08 14:19:33 2010 +0300
@@ -381,8 +381,12 @@
 
     \value Null A QChar with this value isNull().
     \value Nbsp Non-breaking space.
-    \value ReplacementCharacter
-    \value ObjectReplacementCharacter The character shown when a font has no glyph for a certain codepoint. The square character is normally used.
+    \value ReplacementCharacter The character shown when a font has no glyph
+           for a certain codepoint. A special question mark character is often
+           used. Codecs use this codepoint when input data cannot be
+           represented in Unicode.
+    \value ObjectReplacementCharacter Used to represent an object such as an
+           image when such objects cannot be presented.
     \value ByteOrderMark
     \value ByteOrderSwapped
     \value ParagraphSeparator