Version:            (using KDE 4.2.2)
OS:                Linux
Installed from:    Ubuntu Packages

Happens nearly every time i shut down Kontact, ragardles of which Module i'm currently in. Stacktrace as follows:

Application: Kontact (kontact), signal SIGABRT
[Current thread is 0 (LWP 3854)]

Thread 2 (Thread 0xabbb2b90 (LWP 18719)):
#0  0xb7eeb430 in __kernel_vsyscall ()
#1  0xb58427b1 in select () from /lib/tls/i686/cmov/libc.so.6
#2  0xb5b16380 in QProcessManager::run (this=0x8c11060) at io/qprocess_unix.cpp:305
#3  0xb5a4496e in QThreadPrivate::start (arg=0x8c11060) at thread/qthread_unix.cpp:189
#4  0xb503b4ff in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#5  0xb584a49e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread 0xb4755700 (LWP 3854)):
[KCrash Handler]
#6  0xb7eeb430 in __kernel_vsyscall ()
#7  0xb57916d0 in raise () from /lib/tls/i686/cmov/libc.so.6
#8  0xb5793098 in abort () from /lib/tls/i686/cmov/libc.so.6
#9  0xb578a5ce in __assert_fail () from /lib/tls/i686/cmov/libc.so.6
#10 0xb100513c in KMKernel::self () at /build/buildd/kdepim-4.2.2/kmail/kmkernel.cpp:2118
#11 0xb10dd38c in kmcrashHandler (sigId=11) at /build/buildd/kdepim-4.2.2/kmail/kmstartup.cpp:69
#12 0xb6c9f17a in KCrash::defaultCrashHandler (sig=11) at /build/buildd/kde4libs-4.2.2/kdeui/util/kcrash.cpp:224
#13 <signal handler called>
#14 0xb6ceea62 in KPopupFrame::exec (this=0xa817940, pos=@0xbfc062bc) at /usr/include/qt4/QtGui/qwidget.h:477
#15 0xb6ceb627 in KDatePicker::selectYearClicked (this=0xa35e190) at /build/buildd/kde4libs-4.2.2/kdeui/widgets/kdatepicker.cpp:557
#16 0xb6ced02b in KDatePicker::qt_metacall (this=0xa35e190, _c=QMetaObject::InvokeMetaMethod, _id=11, _a=0xbfc063dc) at /build/buildd/kde4libs-4.2.2/obj-i486-linux-gnu/kdeui/kdatepicker.moc:108
#17 0xb5b4eca8 in QMetaObject::activate (sender=0xa8126a8, from_signal_index=31, to_signal_index=31, argv=0xbfc063dc) at kernel/qobject.cpp:3069
#18 0xb5b4f932 in QMetaObject::activate (sender=0xa8126a8, m=0xb68a81e4, local_signal_index=4, argv=0xbfc063dc) at kernel/qobject.cpp:3143
#19 0xb66c05c9 in QAbstractButton::toggled (this=0xa8126a8, _t1=true) at .moc/release-shared/moc_qabstractbutton.cpp:207
#20 0xb63ed445 in QAbstractButton::setChecked (this=0xa8126a8, checked=32) at widgets/qabstractbutton.cpp:763
#21 0xb63ed620 in QAbstractButton::nextCheckState (this=0xa8126a8) at widgets/qabstractbutton.cpp:1017
#22 0xb64d4720 in QToolButton::nextCheckState (this=0x6) at widgets/qtoolbutton.cpp:1133
#23 0xb63ed0c3 in QAbstractButtonPrivate::click (this=0xa8c23b8) at widgets/qabstractbutton.cpp:525
#24 0xb63ed396 in QAbstractButton::mouseReleaseEvent (this=0xa8126a8, e=0xbfc06a18) at widgets/qabstractbutton.cpp:1115
#25 0xb64d4c0c in QToolButton::mouseReleaseEvent (this=0xa8126a8, e=0xbfc06a18) at widgets/qtoolbutton.cpp:709
#26 0xb6060bd3 in QWidget::event (this=0xa8126a8, event=0xbfc06a18) at kernel/qwidget.cpp:7516
#27 0xb63eb34e in QAbstractButton::event (this=0xa8126a8, e=0xbfc06a18) at widgets/qabstractbutton.cpp:1077
#28 0xb64d763a in QToolButton::event (this=0xa8126a8, event=0xbfc06a18) at widgets/qtoolbutton.cpp:1151
#29 0xb6009f2c in QApplicationPrivate::notify_helper (this=0x8c02630, receiver=0xa8126a8, e=0xbfc06a18) at kernel/qapplication.cpp:4084
#30 0xb6012ba1 in QApplication::notify (this=0xbfc07348, receiver=0xa8126a8, e=0xbfc06a18) at kernel/qapplication.cpp:3786
#31 0xb6c2e94d in KApplication::notify (this=0xbfc07348, receiver=0xa8126a8, event=0xbfc06a18) at /build/buildd/kde4libs-4.2.2/kdeui/kernel/kapplication.cpp:307
#32 0xb5b38a3b in QCoreApplication::notifyInternal (this=0xbfc07348, receiver=0xa8126a8, event=0xbfc06a18) at kernel/qcoreapplication.cpp:602
#33 0xb6011c0e in QApplicationPrivate::sendMouseEvent (receiver=0xa8126a8, event=0xbfc06a18, alienWidget=0xa8126a8, nativeWidget=0xa2ff5d8, buttonDown=0xb68b5200, lastMouseReceiver=@0xb68b5204)
    at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:216
#34 0xb6081c96 in QETWidget::translateMouseEvent (this=0xa2ff5d8, event=0xbfc0705c) at kernel/qapplication_x11.cpp:4359
#35 0xb6080d37 in QApplication::x11ProcessEvent (this=0xbfc07348, event=0xbfc0705c) at kernel/qapplication_x11.cpp:3421
#36 0xb60abcfa in x11EventSourceDispatch (s=0x8c04d88, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#37 0xb4c0bb88 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#38 0xb4c0f0eb in ?? () from /usr/lib/libglib-2.0.so.0
#39 0xb4c0f268 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#40 0xb5b64438 in QEventDispatcherGlib::processEvents (this=0x8bdf238, flags={i = -1077906920}) at kernel/qeventdispatcher_glib.cpp:323
#41 0xb60ab3f5 in QGuiEventDispatcherGlib::processEvents (this=0x8bdf238, flags={i = -1077906872}) at kernel/qguieventdispatcher_glib.cpp:202
#42 0xb5b3706a in QEventLoop::processEvents (this=0xbfc072c0, flags={i = -1077906808}) at kernel/qeventloop.cpp:149
#43 0xb5b374aa in QEventLoop::exec (this=0xbfc072c0, flags={i = -1077906744}) at kernel/qeventloop.cpp:200
#44 0xb5b39959 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:880
#45 0xb6009da7 in QApplication::exec () at kernel/qapplication.cpp:3553
#46 0x0804c072 in main (argc=1, argv=0xbfc07644) at /build/buildd/kdepim-4.2.2/kontact/src/main.cpp:218