diff -r 56cd8111b7f7 -r 41300fa6a67c src/gui/painting/qpaintbuffer_p.h
--- a/src/gui/painting/qpaintbuffer_p.h	Tue Jan 26 12:42:25 2010 +0200
+++ b/src/gui/painting/qpaintbuffer_p.h	Tue Feb 02 00:43:10 2010 +0200
@@ -66,6 +66,7 @@
 
 class Q_GUI_EXPORT QPaintBuffer : public QPaintDevice
 {
+    Q_DECLARE_PRIVATE(QPaintBuffer)
 public:
     QPaintBuffer();
     QPaintBuffer(const QPaintBuffer &other);
@@ -311,7 +312,7 @@
     virtual ~QPainterReplayer() { }
 
     void setupTransform(QPainter *painter);
-    void process(const QPaintBufferCommand &cmd);
+    virtual void process(const QPaintBufferCommand &cmd);
     void draw(const QPaintBuffer &buffer, QPainter *painter, int frame);
 
 protected:
@@ -326,7 +327,7 @@
 public:
     QPaintEngineExReplayer() { }
 
-    void process(const QPaintBufferCommand &cmd);
+    virtual void process(const QPaintBufferCommand &cmd);
 };
 
 class QPaintBufferEnginePrivate;