diff -r 5dc02b23752f -r 3e2da88830cd src/corelib/tools/qstring.h
--- a/src/corelib/tools/qstring.h	Tue Jul 06 15:10:48 2010 +0300
+++ b/src/corelib/tools/qstring.h	Wed Aug 18 10:37:55 2010 +0300
@@ -592,7 +592,7 @@
 #endif
 
     bool isSimpleText() const { if (!d->clean) updateProperties(); return d->simpletext; }
-    bool isRightToLeft() const { if (!d->clean) updateProperties(); return d->righttoleft; }
+    bool isRightToLeft() const;
 
     QString(int size, Qt::Initialization);