diff -r 41300fa6a67c -r f7bc934e204c src/gui/text/qtextformat.cpp
--- a/src/gui/text/qtextformat.cpp	Tue Feb 02 00:43:10 2010 +0200
+++ b/src/gui/text/qtextformat.cpp	Wed Mar 31 11:06:36 2010 +0300
@@ -1,6 +1,6 @@
 /****************************************************************************
 **
-** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
 ** All rights reserved.
 ** Contact: Nokia Corporation (qt-info@nokia.com)
 **
@@ -3085,7 +3085,8 @@
             f.d = new QTextFormatPrivate;
         f.d->resolveFont(defaultFnt);
 
-        hashes.insert(hash, idx);
+        if (!hashes.contains(hash, idx))
+            hashes.insert(hash, idx);
 
     } QT_CATCH(...) {
         formats.pop_back();