diff -r 41300fa6a67c -r f7bc934e204c src/gui/painting/qtransform.h
--- a/src/gui/painting/qtransform.h	Tue Feb 02 00:43:10 2010 +0200
+++ b/src/gui/painting/qtransform.h	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)
 **
@@ -293,7 +293,8 @@
     affine._dx  *= num;
     affine._dy  *= num;
     m_33        *= num;
-    m_dirty     |= TxScale;
+    if (m_dirty < TxScale)
+        m_dirty = TxScale;
     return *this;
 }
 inline QTransform &QTransform::operator/=(qreal div)
@@ -316,7 +317,7 @@
     affine._dx  += num;
     affine._dy  += num;
     m_33        += num;
-    m_dirty     |= TxProject;
+    m_dirty     = TxProject;
     return *this;
 }
 inline QTransform &QTransform::operator-=(qreal num)
@@ -332,7 +333,7 @@
     affine._dx  -= num;
     affine._dy  -= num;
     m_33        -= num;
-    m_dirty     |= TxProject;
+    m_dirty     = TxProject;
     return *this;
 }