Application that crashed: kontact
Version of the application: 4.3.5
KDE Version: 4.3.5 (KDE 4.3.5)
Qt Version: 4.5.2
Operating System: Linux 2.6.31-21-generic i686
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
I just clicked on "Send" and Kontact/Kmail crashed. I was using a GMail account with ImapS.

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
[Current thread is 1 (Thread 0xb76ea700 (LWP 15053))]

Thread 3 (Thread 0xb06ccb70 (LWP 16099)):
#0  0x0064c422 in __kernel_vsyscall ()
#1  0x00b4ca71 in select () from /lib/tls/i686/cmov/libc.so.6
#2  0x02b6faf5 in QProcessManager::run (this=0x8ae40d8) at io/qprocess_unix.cpp:296
#3  0x02aa0e32 in QThreadPrivate::start (arg=0x8ae40d8) at thread/qthread_unix.cpp:188
#4  0x0525280e in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#5  0x00b538de in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 2 (Thread 0xaf600b70 (LWP 16119)):
#0  0x0064c422 in __kernel_vsyscall ()
#1  0x05257142 in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/tls/i686/cmov/libpthread.so.0
#2  0x00b608d4 in pthread_cond_timedwait () from /lib/tls/i686/cmov/libc.so.6
#3  0x02aa1def in QWaitConditionPrivate::wait (this=0x9319598, mutex=0x9319594, time=30000) at thread/qwaitcondition_unix.cpp:85
#4  QWaitCondition::wait (this=0x9319598, mutex=0x9319594, time=30000) at thread/qwaitcondition_unix.cpp:159
#5  0x02a969ae in QThreadPoolThread::run (this=0x93196e0) at concurrent/qthreadpool.cpp:140
#6  0x02aa0e32 in QThreadPrivate::start (arg=0x93196e0) at thread/qthread_unix.cpp:188
#7  0x0525280e in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#8  0x00b538de in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread 0xb76ea700 (LWP 15053)):
[KCrash Handler]
#6  DwString::data (aStr=..., aCstr=0x7823314 "content-type") at ../../mimelib/mimelib/string.h:627
#7  DwStrcasecmp (aStr=..., aCstr=0x7823314 "content-type") at ../../mimelib/dwstring.cpp:1771
#8  0x0780f7c2 in DwHeaders::FindField (this=0x9d7bfa8, aFieldName=0x7823314 "content-type") at ../../mimelib/headers.cpp:289
#9  0x0780f8a7 in DwHeaders::HasContentType (this=0x9d7bfa8) at ../../mimelib/headers.cpp:698
#10 0xb44be626 in applyHeadersToMessagePart (headers=<value optimized out>, aPart=<value optimized out>) at ../../kmail/kmmessage.cpp:2649
#11 0xb44bf245 in KMMessage::bodyPart (aDwBodyPart=0x95ebb60, aPart=0x9cbc0f4, withBody=true) at ../../kmail/kmmessage.cpp:2725
#12 0xb4835f6d in partNode::msgPart (this=0x9790670, url=..., w=0x8e06ad0) at ../../kmail/partNode.h:99
#13 statusBarMessage (this=0x9790670, url=..., w=0x8e06ad0) at ../../kmail/urlhandlermanager.cpp:549
#14 0xb4835c1c in KMail::URLHandlerManager::statusBarMessage (this=0x8f95140, url=..., w=0x8e06ad0) at ../../kmail/urlhandlermanager.cpp:323
#15 0xb45cb531 in KMReaderWin::slotUrlOn (this=0x8e06ad0, aUrl=...) at ../../kmail/kmreaderwin.cpp:2031
#16 0xb45ce093 in KMReaderWin::qt_metacall (this=0x8e06ad0, _c=QMetaObject::InvokeMetaMethod, _id=16, _a=0xbff815b8) at ./kmreaderwin.moc:178
#17 0x02ba7263 in QMetaObject::activate (sender=0x8fba480, from_signal_index=14, to_signal_index=14, argv=0xbff815b8) at kernel/qobject.cpp:3113
#18 0x02ba7ec2 in QMetaObject::activate (sender=0x8fba480, m=0x76b9d08, local_signal_index=0, argv=0xbff815b8) at kernel/qobject.cpp:3187
#19 0x07192083 in KHTMLPart::onURL (this=0x8fba480, _t1=...) at ./khtml_part.moc:400
#20 0x071a9f6d in KHTMLPart::overURL (this=0x8fba480, url=..., target=...) at ../../khtml/khtml_part.cpp:3521
#21 0x071ac4b3 in KHTMLPart::handleMouseMoveEventOver (this=0x8fba480, event=0xbff821e0) at ../../khtml/khtml_part.cpp:6355
#22 0x071ac96c in KHTMLPart::khtmlMouseMoveEvent (this=0x8fba480, event=0xbff821e0) at ../../khtml/khtml_part.cpp:6403
#23 0x07192aff in KHTMLPart::customEvent (this=0x8fba480, event=0xbff821e0) at ../../khtml/khtml_part.cpp:5948
#24 0x02ba165f in QObject::event (this=0x8fba480, e=0xbff821e0) at kernel/qobject.cpp:1142
#25 0x00d2af54 in QApplicationPrivate::notify_helper (this=0x8ae2910, receiver=0x8fba480, e=0xbff821e0) at kernel/qapplication.cpp:4056
#26 0x00d3267c in QApplication::notify (this=0xbff84374, receiver=0x8fba480, e=0xbff821e0) at kernel/qapplication.cpp:3603
#27 0x008c725a in KApplication::notify (this=0xbff84374, receiver=0x8fba480, event=0xbff821e0) at ../../kdeui/kernel/kapplication.cpp:302
#28 0x02b916cb in QCoreApplication::notifyInternal (this=0xbff84374, receiver=0x8fba480, event=0xbff821e0) at kernel/qcoreapplication.cpp:610
#29 0x07184da1 in QCoreApplication::sendEvent (this=0x8fbd2d0, _mouse=0xbff82990) at /usr/include/qt4/QtCore/qcoreapplication.h:213
#30 KHTMLView::mouseMoveEvent (this=0x8fbd2d0, _mouse=0xbff82990) at ../../khtml/khtmlview.cpp:1541
#31 0x00d7fe63 in QWidget::event (this=0x8fbd2d0, event=0xbff82990) at kernel/qwidget.cpp:7534
#32 0x0112f633 in QFrame::event (this=0x8fbd2d0, e=0xbff82990) at widgets/qframe.cpp:559
#33 0x0718151c in KHTMLView::widgetEvent (this=0x8fbd2d0, e=0xb3) at ../../khtml/khtmlview.cpp:2338
#34 0x07181805 in KHTMLView::eventFilter (this=0x8fbd2d0, o=0x8fbe8e8, e=0xbff82990) at ../../khtml/khtmlview.cpp:2191
#35 0x02b9083a in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=0x8ae2910, receiver=0x8fbe8e8, event=0xbff82990) at kernel/qcoreapplication.cpp:726
#36 0x00d2af2c in QApplicationPrivate::notify_helper (this=0x8ae2910, receiver=0x8fbe8e8, e=0xbff82990) at kernel/qapplication.cpp:4052
#37 0x00d33033 in QApplication::notify (this=0xbff84374, receiver=0x8fbe8e8, e=0xbff82990) at kernel/qapplication.cpp:3758
#38 0x008c725a in KApplication::notify (this=0xbff84374, receiver=0x8fbe8e8, event=0xbff82990) at ../../kdeui/kernel/kapplication.cpp:302
#39 0x02b916cb in QCoreApplication::notifyInternal (this=0xbff84374, receiver=0x8fbe8e8, event=0xbff82990) at kernel/qcoreapplication.cpp:610
#40 0x00d31f6e in QCoreApplication::sendSpontaneousEvent (receiver=0x8fbe8e8, event=0xbff82990, alienWidget=0x8fbe8e8, nativeWidget=0x8adb140, buttonDown=0x15a5aa0, lastMouseReceiver=...)
    at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:216
#41 QApplicationPrivate::sendMouseEvent (receiver=0x8fbe8e8, event=0xbff82990, alienWidget=0x8fbe8e8, nativeWidget=0x8adb140, buttonDown=0x15a5aa0, lastMouseReceiver=...)
    at kernel/qapplication.cpp:2924
#42 0x00da07c0 in QETWidget::translateMouseEvent (this=0x8adb140, event=0xbff83fdc) at kernel/qapplication_x11.cpp:4409
#43 0x00d9fc4b in QApplication::x11ProcessEvent (this=0xbff84374, event=0xbff83fdc) at kernel/qapplication_x11.cpp:3428
#44 0x00dcc502 in x11EventSourceDispatch (s=0x8adefa8, callback=0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#45 0x0240ae88 in g_main_dispatch (context=0x8addb10) at /build/buildd/glib2.0-2.22.3/glib/gmain.c:1960
#46 IA__g_main_context_dispatch (context=0x8addb10) at /build/buildd/glib2.0-2.22.3/glib/gmain.c:2513
#47 0x0240e730 in g_main_context_iterate (context=0x8addb10, block=<value optimized out>, dispatch=1, self=0x8ad33c0) at /build/buildd/glib2.0-2.22.3/glib/gmain.c:2591
#48 0x0240e863 in IA__g_main_context_iteration (context=0x8addb10, may_block=1) at /build/buildd/glib2.0-2.22.3/glib/gmain.c:2654
#49 0x02bbc02c in QEventDispatcherGlib::processEvents (this=0x8ab49f8, flags=...) at kernel/qeventdispatcher_glib.cpp:327
#50 0x00dcbbe5 in QGuiEventDispatcherGlib::processEvents (this=0x8ab49f8, flags=...) at kernel/qguieventdispatcher_glib.cpp:202
#51 0x02b8fc79 in QEventLoop::processEvents (this=0xbff842d4, flags=) at kernel/qeventloop.cpp:149
#52 0x02b900ca in QEventLoop::exec (this=0xbff842d4, flags=...) at kernel/qeventloop.cpp:201
#53 0x02b9253f in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#54 0x00d2add7 in QApplication::exec () at kernel/qapplication.cpp:3525
#55 0x0804b4e6 in main (argc=1, argv=0xbff84594) at ../../../kontact/src/main.cpp:218

Reported using DrKonqi