Application that crashed: kontact
Version of the application: 4.3.1
KDE Version: 4.3.1 (KDE 4.3.1)
Qt Version: 4.5.2
Operating System: Linux 2.6.30.5 i686

What I was doing when the application crashed:
I added a new remote calendar, and clicked OK. The new calendar appeared on the list on the bottom-left and then Kontact crashed.

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
[Current thread is 0 (LWP 2231)]

Thread 2 (Thread 0xb1652b70 (LWP 2232)):
#0  0xb8007424 in __kernel_vsyscall ()
#1  0x46f11551 in select () from /lib/libc.so.6
#2  0x41df875d in QProcessManager::run (this=) at io/qprocess_unix.cpp:296
#3  0x41d33ec8 in QThreadPrivate::start (arg=) at thread/qthread_unix.cpp:188
#4  0x46fd4900 in start_thread () from /lib/libpthread.so.0

Thread 1 (Thread 0xb5955700 (LWP 2231)):
[KCrash Handler]
#6  QEventLoop::exec (this=<value optimized out>, flags=) at ../../include/QtCore/../../src/corelib/tools/qvector.h:129
#7  0xb26b1749 in KMAccount::runPrecommand (this=0x8ff1110, precommand=@0x93e96a8) at /var/tmp/portage/kde-base/kmail-4.3.1/work/kmail-4.3.1/kmail/kmaccount.cpp:407
#8  0xb274f635 in KMAcctLocal::preProcess (this=0x8ff1110) at /var/tmp/portage/kde-base/kmail-4.3.1/work/kmail-4.3.1/kmail/kmacctlocal.cpp:128
#9  0xb2750423 in KMAcctLocal::processNewMail (this=0x8ff1110) at /var/tmp/portage/kde-base/kmail-4.3.1/work/kmail-4.3.1/kmail/kmacctlocal.cpp:66
#10 0xb27451ed in KMail::AccountManager::processNextCheck (this=0x8f8d3a0, _newMail=44) at /var/tmp/portage/kde-base/kmail-4.3.1/work/kmail-4.3.1/kmail/accountmanager.cpp:230
#11 0xb2745c98 in KMail::AccountManager::singleCheckMail (this=0x8f8d3a0, account=0x8ff1110, interactive=true) at /var/tmp/portage/kde-base/kmail-4.3.1/work/kmail-4.3.1/kmail/accountmanager.cpp:157
#12 0xb27460ce in KMail::AccountManager::checkMail (this=0x8f8d3a0, _interactive=true) at /var/tmp/portage/kde-base/kmail-4.3.1/work/kmail-4.3.1/kmail/accountmanager.cpp:352
#13 0xb2909558 in KMMainWidget::slotCheckMail (this=0x8fc7308) at /var/tmp/portage/kde-base/kmail-4.3.1/work/kmail-4.3.1/kmail/kmmainwidget.cpp:1045
#14 0xb292fe4f in KMMainWidget::qt_metacall (this=0x8fc7308, _c=QMetaObject::InvokeMetaMethod, _id=9, _a=0xbf988828)
    at /var/tmp/portage/kde-base/kmail-4.3.1/work/kmail-4.3.1_build/kmail/kmmainwidget.moc:355
#15 0x41e28a01 in QMetaObject::activate (sender=<value optimized out>, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=<value optimized out>)
    at kernel/qobject.cpp:3101
#16 0x41e28fc3 in QMetaObject::activate (sender=<value optimized out>, m=<value optimized out>, local_signal_index=<value optimized out>, argv=) at kernel/qobject.cpp:3178
#17 0x41e2f2c8 in QSingleShotTimer::timeout (this=) at .moc/release-shared/qtimer.moc:76
#18 0x41e2f3fd in QSingleShotTimer::timerEvent (this=<value optimized out>) at kernel/qtimer.cpp:298
#19 0x41e2570f in QObject::event (this=<value optimized out>, e=<value optimized out>) at kernel/qobject.cpp:1066
#20 0xb72fe12c in QApplicationPrivate::notify_helper (this=0x8d217b8, receiver=0x93b2a78, e=0xbf988c9c) at kernel/qapplication.cpp:4056
#21 0xb73042fd in QApplication::notify (this=0xbf988f74, receiver=0x93b2a78, e=0xbf988c9c) at kernel/qapplication.cpp:3952
#22 0xb7c7fc32 in KApplication::notify (this=0xbf988f74, receiver=0x93b2a78, event=0xbf988c9c) at /var/tmp/portage/kde-base/kdelibs-4.3.1/work/kdelibs-4.3.1/kdeui/kernel/kapplication.cpp:302
#23 0x41e161f2 in QCoreApplication::notifyInternal (this=) at kernel/qcoreapplication.cpp:606
#24 0x41e41191 in QTimerInfoList::activateTimers (this=<value optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#25 0x41e3ddd1 in timerSourceDispatch (source=) at kernel/qeventdispatcher_glib.cpp:165
#26 0x41bd71cf in IA__g_main_context_dispatch (context=) at gmain.c:1824
#27 0x41bda998 in g_main_context_iterate (context=<value optimized out>, block=<value optimized out>, dispatch=) at gmain.c:2455
#28 0x41bdaabf in IA__g_main_context_iteration (context=<value optimized out>, may_block=) at gmain.c:2518
#29 0x41e3dd29 in QEventDispatcherGlib::processEvents (this=<value optimized out>, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:327
#30 0xb739269b in QGuiEventDispatcherGlib::processEvents (this=0x8d178f8, flags={i = 36}) at kernel/qguieventdispatcher_glib.cpp:202
#31 0x41e1493b in QEventLoop::processEvents (this=<value optimized out>, flags=<value optimized out>) at kernel/qeventloop.cpp:149
#32 0x41e14b1a in QEventLoop::exec (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:197
#33 0x41e16d91 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#34 0xb72fdf95 in QApplication::exec () at kernel/qapplication.cpp:3525
#35 0x0804b7a1 in main (argc=1, argv=0xbf989174) at /var/tmp/portage/kde-base/kontact-4.3.1/work/kontact-4.3.1/kontact/src/main.cpp:218

Reported using DrKonqi