Application that crashed: kontact
Version of the application: 4.3.2
KDE Version: 4.3.1 (KDE 4.3.1) "release 6"
Qt Version: 4.5.3
Operating System: Linux 2.6.31.12-0.1-desktop x86_64
Distribution: "openSUSE 11.2 (x86_64)"

What I was doing when the application crashed:
Just before the crash, I tried to move mails from one IMAP-Account to another. 

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
[KCrash Handler]
#5  0x00007ff3670084cf in ?? () from /usr/lib64/libQtGui.so.4
#6  0x00007ff36700b519 in QTreeWidget::visualItemRect(QTreeWidgetItem const*) const () from /usr/lib64/libQtGui.so.4
#7  0x00007ff34f45d6a9 in KMail::FolderView::paintEvent(QPaintEvent*) () from /usr/lib64/libkmailprivate.so.4
#8  0x00007ff366b29ad0 in QWidget::event(QEvent*) () from /usr/lib64/libQtGui.so.4
#9  0x00007ff366e68ab6 in QFrame::event(QEvent*) () from /usr/lib64/libQtGui.so.4
#10 0x00007ff366f9af1b in QAbstractItemView::viewportEvent(QEvent*) () from /usr/lib64/libQtGui.so.4
#11 0x00007ff366fd2090 in QTreeView::viewportEvent(QEvent*) () from /usr/lib64/libQtGui.so.4
#12 0x00007ff36760f127 in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () from /usr/lib64/libQtCore.so.4
#13 0x00007ff366adb27c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4
#14 0x00007ff366ae257e in QApplication::notify(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4
#15 0x00007ff367f888d6 in KApplication::notify(QObject*, QEvent*) () from /usr/lib64/libkdeui.so.5
#16 0x00007ff36760fddc in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib64/libQtCore.so.4
#17 0x00007ff366b30e93 in QWidgetPrivate::drawWidget(QPaintDevice*, QRegion const&, QPoint const&, int, QPainter*, QWidgetBackingStore*) () from /usr/lib64/libQtGui.so.4
#18 0x00007ff366ca19fe in ?? () from /usr/lib64/libQtGui.so.4
#19 0x00007ff366b23300 in QWidgetPrivate::syncBackingStore() () from /usr/lib64/libQtGui.so.4
#20 0x00007ff366b298e8 in QWidget::event(QEvent*) () from /usr/lib64/libQtGui.so.4
#21 0x00007ff366e830bb in QMainWindow::event(QEvent*) () from /usr/lib64/libQtGui.so.4
#22 0x00007ff368093d83 in KXmlGuiWindow::event(QEvent*) () from /usr/lib64/libkdeui.so.5
#23 0x00007ff366adb2ac in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4
#24 0x00007ff366ae257e in QApplication::notify(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4
#25 0x00007ff367f888d6 in KApplication::notify(QObject*, QEvent*) () from /usr/lib64/libkdeui.so.5
#26 0x00007ff36760fddc in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib64/libQtCore.so.4
#27 0x00007ff3676109ea in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib64/libQtCore.so.4
#28 0x00007ff367638803 in ?? () from /usr/lib64/libQtCore.so.4
#29 0x00007ff36020cdee in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0
#30 0x00007ff3602107b8 in ?? () from /usr/lib64/libglib-2.0.so.0
#31 0x00007ff3602108e0 in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#32 0x00007ff3676383a3 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#33 0x00007ff366b6e31e in ?? () from /usr/lib64/libQtGui.so.4
#34 0x00007ff36760e712 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#35 0x00007ff36760eae4 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#36 0x00007ff366b594ac in QDragManager::drag(QDrag*) () from /usr/lib64/libQtGui.so.4
#37 0x00007ff366aed518 in QDrag::exec(QFlags<Qt::DropAction>, Qt::DropAction) () from /usr/lib64/libQtGui.so.4
#38 0x00007ff366aed5d3 in QDrag::exec(QFlags<Qt::DropAction>) () from /usr/lib64/libQtGui.so.4
#39 0x00007ff34f7db5d8 in ?? () from /usr/lib64/libkmailprivate.so.4
#40 0x00007ff34f82580d in ?? () from /usr/lib64/libkmailprivate.so.4
#41 0x00007ff366b29b52 in QWidget::event(QEvent*) () from /usr/lib64/libQtGui.so.4
#42 0x00007ff366e68ab6 in QFrame::event(QEvent*) () from /usr/lib64/libQtGui.so.4
#43 0x00007ff366f9af1b in QAbstractItemView::viewportEvent(QEvent*) () from /usr/lib64/libQtGui.so.4
#44 0x00007ff366fd2090 in QTreeView::viewportEvent(QEvent*) () from /usr/lib64/libQtGui.so.4
#45 0x00007ff36760f127 in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () from /usr/lib64/libQtCore.so.4
#46 0x00007ff366adb27c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4
#47 0x00007ff366ae23c1 in QApplication::notify(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4
#48 0x00007ff367f888d6 in KApplication::notify(QObject*, QEvent*) () from /usr/lib64/libkdeui.so.5
#49 0x00007ff36760fddc in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib64/libQtCore.so.4
#50 0x00007ff366ae1c90 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&) () from /usr/lib64/libQtGui.so.4
#51 0x00007ff366b47cfe in ?? () from /usr/lib64/libQtGui.so.4
#52 0x00007ff366b46d9a in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib64/libQtGui.so.4
#53 0x00007ff366b6eb6c in ?? () from /usr/lib64/libQtGui.so.4
#54 0x00007ff36020cdee in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0
#55 0x00007ff3602107b8 in ?? () from /usr/lib64/libglib-2.0.so.0
#56 0x00007ff3602108e0 in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#57 0x00007ff3676383a3 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#58 0x00007ff366b6e31e in ?? () from /usr/lib64/libQtGui.so.4
#59 0x00007ff36760e712 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#60 0x00007ff36760eae4 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#61 0x00007ff367610c99 in QCoreApplication::exec() () from /usr/lib64/libQtCore.so.4
#62 0x0000000000403f67 in _start ()

Reported using DrKonqi