Breakpoint 2, QPainter::begin (this=0xbffc2c90, pd=0xbffc2c70) at 
painting/qpainter.cpp:1643
1643                    qWarning("QPainter::begin: Cannot paint on a null pixmap");         
(gdb) bt                                                                                    
#0  QPainter::begin (this=0xbffc2c90, pd=0xbffc2c70) at painting/qpainter.cpp:1643
#1  0xb6b1027f in QPainter (this=0xbffc2c90, pd=0xbffc2c70) at 
painting/qpainter.cpp:1351
#2  0xb6f124a9 in QGraphicsScenePrivate::drawItemHelper (item=0x8185998, 
painter=0xbffc38dc, option=0x81b4ab0, widget=0x81081b8)
    at graphicsview/qgraphicsscene.cpp:3874
#3  0xb6f12e07 in QGraphicsScene::drawItems (this=0xbffc4a74, painter=0xbffc38dc, 
numItems=3, items=0x81947d0, options=0x81b4a2c,
    widget=0x81081b8) at graphicsview/qgraphicsscene.cpp:3964
#4  0xb6f2197c in QGraphicsView::drawItems (this=0xbffc4a60, painter=0xbffc38dc, 
numItems=3, items=0x81947d0, options=0x81b4a2c)
    at graphicsview/qgraphicsview.cpp:3315
#5  0xb6f2981e in QGraphicsView::paintEvent (this=0xbffc4a60, event=0xbffc3e74) at 
graphicsview/qgraphicsview.cpp:3067
#6  0xb6a79829 in QWidget::event (this=0xbffc4a60, event=0xbffc3e74) at 
kernel/qwidget.cpp:6988
#7  0xb6d4e233 in QFrame::event (this=0xbffc4a60, e=0xbffc3e74) at 
widgets/qframe.cpp:657
#8  0xb6dd1c5f in QAbstractScrollArea::viewportEvent (this=0xbffc4a60, e=0xb7005f08) 
at widgets/qabstractscrollarea.cpp:938
#9  0xb6f2b3cf in QGraphicsView::viewportEvent (this=0xbffc4a60, event=0xbffc3e74) at 
graphicsview/qgraphicsview.cpp:2267
#10 0xb6dd2e45 in QAbstractScrollAreaFilter::eventFilter (this=0x81089b8, 
o=0x81081b8, e=0xbffc3e74) at widgets/qabstractscrollarea_p.h:102
#11 0xb71d73d1 in QCoreApplicationPrivate::sendThroughObjectEventFilters 
(this=0x805a9f0, receiver=0x81081b8, event=0xbffc3e74)
    at kernel/qcoreapplication.cpp:693
#12 0xb6a29ef3 in QApplicationPrivate::notify_helper (this=0x805a9f0, 
receiver=0x81081b8, e=0xbffc3e74) at kernel/qapplication.cpp:3731
#13 0xb6a30a68 in QApplication::notify (this=0xbffc4a98, receiver=0x81081b8, 
e=0xbffc3e74) at kernel/qapplication.cpp:3702
#14 0xb77f454d in KApplication::notify (this=0xbffc4a98, receiver=0x81081b8, 
event=0xbffc3e74)
    at /home/ulet/kde-svn/kdelibs/kdeui/kernel/kapplication.cpp:311
#15 0xb71d6f59 in QCoreApplication::notifyInternal (this=0xbffc4a98, 
receiver=0x81081b8, event=0xbffc3e74) at kernel/qcoreapplication.cpp:582
#16 0xb6a7e8ee in qt_sendSpontaneousEvent (receiver=0x81081b8, event=0xbffc3e74)
    at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:218
#17 0xb6a73326 in QWidgetPrivate::drawWidget (this=0x8108c60, pdev=0x81072ec, 
rgn=@0xbffc402c, offset=@0xbffc4004, flags=<value optimized out>,
    sharedPainter=0x8203828) at kernel/qwidget.cpp:4421
#18 0xb6a73abe in QWidgetPrivate::paintSiblingsRecursive (this=0x8107a40, 
pdev=0x81072ec, siblings=@0xbffc41a0, index=3, rgn=@0xbffc4294,
    offset=@0x81aa2f4, flags=4, sharedPainter=0x8203828) at kernel/qwidget.cpp:4519
#19 0xb6a72fe7 in QWidgetPrivate::drawWidget (this=0x8107a40, pdev=0x81072ec, 
rgn=@0xbffc4294, offset=@0x81aa2f4, flags=4,
    sharedPainter=0x8203828) at kernel/qwidget.cpp:4462
#20 0xb6baff63 in QWidgetBackingStore::cleanRegion (this=0x81aa2e8, rgn=@0xbffc42e8, 
widget=0xbffc4a60, recursiveCopyToScreen=true)
    at painting/qbackingstore.cpp:1041
#21 0xb6bb02f7 in qt_syncBackingStore (widget=0xbffc4a60) at 
painting/qbackingstore.cpp:315
#22 0xb6a7929f in QWidget::event (this=0xbffc4a60, event=0x81da6d8) at 
kernel/qwidget.cpp:7132
#23 0xb6d4e233 in QFrame::event (this=0xbffc4a60, e=0x81da6d8) at 
widgets/qframe.cpp:657
#24 0xb6dd2331 in QAbstractScrollArea::event (this=0xbffc4a60, e=0x81da6d8) at 
widgets/qabstractscrollarea.cpp:894
#25 0xb6f20fd4 in QGraphicsView::event (this=0xbffc4a60, event=0x81da6d8) at 
graphicsview/qgraphicsview.cpp:2206
#26 0xb6a29f1c in QApplicationPrivate::notify_helper (this=0x805a9f0, 
receiver=0xbffc4a60, e=0x81da6d8) at kernel/qapplication.cpp:3735
#27 0xb6a30a68 in QApplication::notify (this=0xbffc4a98, receiver=0xbffc4a60, 
e=0x81da6d8) at kernel/qapplication.cpp:3702