Application: kontact (4.4.7)
KDE Platform Version: 4.5.3 (KDE 4.5.3)
Qt Version: 4.6.3
Operating System: FreeBSD 8.1-STABLE i386
Distribution (Platform): FreeBSD Ports

-- Information about the crash:
- What I was doing when the application crashed:
Moving kontact from one monitor to another on an extended desktop.

- Unusual behavior I noticed:
I have my desktop extended across two monitors. There was an overlay of konsole on kontact, the kontact application was open on my second monitor but its interface was showing what konsole was currently showing on my first monitor. This persisted even when I disabled multiple desktops. Which ever application I was accessing before kontact, when I switched to kontact, that application appeared to overlay kontact. I noticed that it appears with which ever other application I am using. If I am accessing kontact and move to Dolphin, kontact appears to overlay Dolphin, if I am using firefox and switched to any other application, say openoffice-calc, firefox appears to overlay openoffice-calc.

This behaviour stops when I disable compositing.

-- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault: 11
[Current thread is 1 (Thread 345ad100 (LWP 100317))]

Thread 2 (Thread 2cd01140 (LWP 100277)):
[KCrash Handler]
#7  0x2af7da06 in QObjectPrivate::~QObjectPrivate () from /usr/local/lib/qt4/libQtCore.so.4
#8  0x3144e95b in KMail::makeComposer () from /usr/local/kde4/lib/libkmailprivate.so.5
#9  0x31838457 in KMail::MessageActions::MessageActions () from /usr/local/kde4/lib/libkmailprivate.so.5
#10 0x3183d767 in KConfigGroup::readEntry<QColor> () from /usr/local/kde4/lib/libkmailprivate.so.5
#11 0x31b0b7f4 in MessageList::Core::View::slotSelectionChanged () from /usr/local/kde4/lib/libmessagelist.so.5
#12 0x31b0bd57 in MessageList::Core::View::qt_metacall () from /usr/local/kde4/lib/libmessagelist.so.5
#13 0x2af6d0a3 in QMetaObject::metacall () from /usr/local/lib/qt4/libQtCore.so.4
#14 0x2af7a236 in QMetaObject::activate () from /usr/local/lib/qt4/libQtCore.so.4
#15 0x2a68bef9 in QItemSelectionModel::selectionChanged () from /usr/local/lib/qt4/libQtGui.so.4
#16 0x2a695a12 in QItemSelectionModel::emitSelectionChanged () from /usr/local/lib/qt4/libQtGui.so.4
#17 0x2a695ffa in QItemSelectionModel::select () from /usr/local/lib/qt4/libQtGui.so.4
#18 0x2a678a16 in QTreeViewPrivate::select () from /usr/local/lib/qt4/libQtGui.so.4
#19 0x2a679992 in QTreeView::setSelection () from /usr/local/lib/qt4/libQtGui.so.4
#20 0x2a634608 in QAbstractItemView::mousePressEvent () from /usr/local/lib/qt4/libQtGui.so.4
#21 0x2a67fb24 in QTreeView::mousePressEvent () from /usr/local/lib/qt4/libQtGui.so.4
#22 0x31b0ae4a in MessageList::Core::View::mousePressEvent () from /usr/local/kde4/lib/libmessagelist.so.5
#23 0x2a10393c in QWidget::event () from /usr/local/lib/qt4/libQtGui.so.4
#24 0x2a4ea463 in QFrame::event () from /usr/local/lib/qt4/libQtGui.so.4
#25 0x2a585a72 in QAbstractScrollArea::viewportEvent () from /usr/local/lib/qt4/libQtGui.so.4
#26 0x2a63a345 in QAbstractItemView::viewportEvent () from /usr/local/lib/qt4/libQtGui.so.4
#27 0x2a67b189 in QTreeView::viewportEvent () from /usr/local/lib/qt4/libQtGui.so.4
#28 0x2a5880c5 in QAbstractScrollAreaFilter::eventFilter () from /usr/local/lib/qt4/libQtGui.so.4
#29 0x2af67181 in QCoreApplicationPrivate::sendThroughObjectEventFilters () from /usr/local/lib/qt4/libQtCore.so.4
#30 0x2a09fe83 in QApplicationPrivate::notify_helper () from /usr/local/lib/qt4/libQtGui.so.4
#31 0x2a0a7f3e in QApplication::notify () from /usr/local/lib/qt4/libQtGui.so.4
#32 0x29c00853 in KApplication::notify () from /usr/local/kde4/lib/libkdeui.so.7
#33 0x2af66dfb in QCoreApplication::notifyInternal () from /usr/local/lib/qt4/libQtCore.so.4
#34 0x2a0a3239 in QApplicationPrivate::sendMouseEvent () from /usr/local/lib/qt4/libQtGui.so.4
#35 0x2a130946 in QETWidget::translateMouseEvent () from /usr/local/lib/qt4/libQtGui.so.4
#36 0x2a12ff43 in QApplication::x11ProcessEvent () from /usr/local/lib/qt4/libQtGui.so.4
#37 0x2a15a724 in x11EventSourceDispatch () from /usr/local/lib/qt4/libQtGui.so.4
#38 0x2c4b7139 in g_main_context_dispatch () from /usr/local/lib/libglib-2.0.so.0
#39 0x2c4ba5a6 in g_main_context_check () from /usr/local/lib/libglib-2.0.so.0
#40 0x2c4baa5c in g_main_context_iteration () from /usr/local/lib/libglib-2.0.so.0
#41 0x2af948fb in QEventDispatcherGlib::processEvents () from /usr/local/lib/qt4/libQtCore.so.4
#42 0x2a15a555 in QGuiEventDispatcherGlib::processEvents () from /usr/local/lib/qt4/libQtGui.so.4
#43 0x2af65e03 in QEventLoop::processEvents () from /usr/local/lib/qt4/libQtCore.so.4
#44 0x2af6617a in QEventLoop::exec () from /usr/local/lib/qt4/libQtCore.so.4
#45 0x2af685f6 in QCoreApplication::exec () from /usr/local/lib/qt4/libQtCore.so.4
#46 0x2a09f687 in QApplication::exec () from /usr/local/lib/qt4/libQtGui.so.4
#47 0x0804bb3f in ?? ()
#48 0x0804a6a7 in ?? ()
#49 0x00000003 in ?? ()
#50 0xbfbfe80c in ?? ()
#51 0xbfbfe81c in ?? ()
#52 0xbfbfe7f0 in ?? ()
#53 0xbfbfe808 in ?? ()
#54 0x00000000 in ?? ()
#55 0xbfbfe804 in ?? ()
#56 0x0804a615 in ?? ()

Thread 1 (Thread 345ad100 (LWP 100317)):
#0  0x2b4dd217 in __error () from /lib/libthr.so.3
#1  0x2b4dcdf8 in __error () from /lib/libthr.so.3
#2  0x345c71e0 in ?? ()
#3  0x00000008 in ?? ()
#4  0x00000001 in ?? ()
#5  0x345c71c0 in ?? ()
#6  0xbf9feeac in ?? ()
#7  0x00000003 in ?? ()
#8  0x00000000 in ?? ()
#9  0x2b4db75f in pthread_setcancelstate () from /lib/libthr.so.3
#10 0x2b4daffe in pthread_cond_signal () from /lib/libthr.so.3
#11 0x2ae62354 in QWaitCondition::wait () from /usr/local/lib/qt4/libQtCore.so.4
#12 0x2ae56db6 in QThreadPoolThread::run () from /usr/local/lib/qt4/libQtCore.so.4
#13 0x2ae61857 in QThreadPrivate::start () from /usr/local/lib/qt4/libQtCore.so.4
#14 0x2b4d275f in pthread_getprio () from /lib/libthr.so.3
#15 0x00000000 in ?? ()

Reported using DrKonqi