Application that crashed: kontact
Version of the application: 4.3.2
KDE Version: 4.3.2 (KDE 4.3.2)
Qt Version: 4.5.3
Operating System: Linux 2.6.30-2-686 i686

What I was doing when the application crashed:
booting up, auto start in .xsession (not using KDE desktop), since no network tried to close, crash.

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
[KCrash Handler]
#6  QString (this=0x64416562) at /usr/include/qt4/QtCore/qstring.h:711
#7  KIO::Slave::protocol (this=0x64416562) at ../../kio/kio/slave.cpp:176
#8  0xb626eef9 in KIO::SchedulerPrivate::disconnectSlave (this=0x90ccd70, slave=0x64416562) at ../../kio/kio/scheduler.cpp:988
#9  0xb626fd7f in KIO::Scheduler::disconnectSlave (slave=0x64416562) at ../../kio/kio/scheduler.cpp:309
#10 0xb0b67558 in KMail::ImapAccountBase::slotSchedulerSlaveError (this=0x9223f38, aSlave=0x946b350, errorCode=114, errorMsg=...) at ../../kmail/imapaccountbase.cpp:648
#11 0xb0b6fd01 in KMail::ImapAccountBase::qt_metacall (this=0x9223f38, _c=QMetaObject::InvokeMetaMethod, _id=12, _a=0xbf8d6404) at ./imapaccountbase.moc:130
#12 0xb0b7754a in KMAcctImap::qt_metacall (this=0x9223f38, _c=QMetaObject::InvokeMetaMethod, _id=22, _a=0xbf8d6404) at ./kmacctimap.moc:77
#13 0xb7797303 in QMetaObject::activate (sender=0x911d0b0, from_signal_index=5, to_signal_index=5, argv=0xbf8d6404) at kernel/qobject.cpp:3112
#14 0xb7797f42 in QMetaObject::activate (sender=0x911d0b0, m=0xb6368830, local_signal_index=1, argv=0xbf8d6404) at kernel/qobject.cpp:3186
#15 0xb626da9f in KIO::Scheduler::slaveError (this=0x911d0b0, _t1=0x946b350, _t2=114, _t3=...) at ./scheduler.moc:126
#16 0xb626edbc in KIO::SchedulerPrivate::slotSlaveError (this=0x90ccd70, errorNr=114, errorMsg=...) at ../../kio/kio/scheduler.cpp:949
#17 0xb62745b6 in KIO::Scheduler::qt_metacall (this=0x911d0b0, _c=QMetaObject::InvokeMetaMethod, _id=9, _a=0xbf8d6548) at ./scheduler.moc:105
#18 0xb7797303 in QMetaObject::activate (sender=0x946b350, from_signal_index=6, to_signal_index=6, argv=0xbf8d6548) at kernel/qobject.cpp:3112
#19 0xb7797f42 in QMetaObject::activate (sender=0x946b350, m=0xb6368ba4, local_signal_index=2, argv=0xbf8d6548) at kernel/qobject.cpp:3186
#20 0xb6286869 in KIO::SlaveInterface::error (this=0x946b350, _t1=114, _t2=...) at ./slaveinterface.moc:153
#21 0xb628a677 in KIO::SlaveInterface::dispatch (this=0x946b350, _cmd=102, rawdata=...) at ../../kio/kio/slaveinterface.cpp:208
#22 0xb6286cb7 in KIO::SlaveInterface::dispatch (this=0x946b350) at ../../kio/kio/slaveinterface.cpp:91
#23 0xb6278c9d in KIO::Slave::gotInput (this=0x946b350) at ../../kio/kio/slave.cpp:322
#24 0xb627b183 in KIO::Slave::qt_metacall (this=0x946b350, _c=QMetaObject::InvokeMetaMethod, _id=2, _a=0xbf8d67d8) at ./slave.moc:76
#25 0xb7797303 in QMetaObject::activate (sender=0x946f718, from_signal_index=4, to_signal_index=4, argv=0x0) at kernel/qobject.cpp:3112
#26 0xb7797f42 in QMetaObject::activate (sender=0x946f718, m=0xb63654e0, local_signal_index=0, argv=0x0) at kernel/qobject.cpp:3186
#27 0xb6184d57 in KIO::Connection::readyRead (this=0x946f718) at ./connection.moc:86
#28 0xb6186663 in KIO::ConnectionPrivate::dequeue (this=0x946f728) at ../../kio/kio/connection.cpp:82
#29 0xb6186a46 in KIO::Connection::qt_metacall (this=0x946f718, _c=QMetaObject::InvokeMetaMethod, _id=1, _a=0x9075cb8) at ./connection.moc:73
#30 0xb7790b0b in QMetaCallEvent::placeMetaCall (this=0x946afe0, object=0x946f718) at kernel/qobject.cpp:477
#31 0xb77925e0 in QObject::event (this=0x946f718, e=0x946afe0) at kernel/qobject.cpp:1110
#32 0xb6dc1a94 in QApplicationPrivate::notify_helper (this=0x8e96db0, receiver=0x946f718, e=0x946afe0) at kernel/qapplication.cpp:4065
#33 0xb6dc9bee in QApplication::notify (this=0xbf8d709c, receiver=0x946f718, e=0x946afe0) at kernel/qapplication.cpp:3605
#34 0xb7c840fd in KApplication::notify (this=0xbf8d709c, receiver=0x946f718, event=0x946afe0) at ../../kdeui/kernel/kapplication.cpp:302
#35 0xb77821eb in QCoreApplication::notifyInternal (this=0xbf8d709c, receiver=0x946f718, event=0x946afe0) at kernel/qcoreapplication.cpp:610
#36 0xb7782e2e in QCoreApplication::sendEvent (receiver=0x0, event_type=0, data=0x8e69a08) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#37 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x8e69a08) at kernel/qcoreapplication.cpp:1247
#38 0xb778300d in QCoreApplication::sendPostedEvents (receiver=0x0, event_type=0) at kernel/qcoreapplication.cpp:1140
#39 0xb77ad4cf in QCoreApplication::sendPostedEvents (s=0x8e98d28) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:218
#40 postEventSourceDispatch (s=0x8e98d28) at kernel/qeventdispatcher_glib.cpp:276
#41 0xb5200f28 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#42 0xb52046b3 in ?? () from /lib/libglib-2.0.so.0
#43 0xb5204838 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#44 0xb77ad041 in QEventDispatcherGlib::processEvents (this=0x8e886e0, flags=...) at kernel/qeventdispatcher_glib.cpp:407
#45 0xb6e61305 in QGuiEventDispatcherGlib::processEvents (this=0x8e886e0, flags=...) at kernel/qguieventdispatcher_glib.cpp:202
#46 0xb778083a in QEventLoop::processEvents (this=0xbf8d6f10, flags=...) at kernel/qeventloop.cpp:149
#47 0xb7780c82 in QEventLoop::exec (this=0xbf8d6f10, flags=...) at kernel/qeventloop.cpp:201
#48 0xb77830d9 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#49 0xb6dc1917 in QApplication::exec () at kernel/qapplication.cpp:3525
#50 0x0804bd40 in main (argc=1, argv=0xbf8d7294) at ../../../kontact/src/main.cpp:218

Reported using DrKonqi