Application that crashed: kontact
Version of the application: 4.3.2
KDE Version: 4.3.2 (KDE 4.3.2)
Qt Version: 4.5.2
Operating System: Linux 2.6.31-14-generic i686
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
Opening a JPEG attachment, Kontact/Kmail crashed with the trace attached. This does not seem to happen every time. I am so far unable to see a pattern.

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
[KCrash Handler]
#6  KMMessagePart::contentTransferEncoding (this=0x937b404) at ../../kmail/kmmsgpart.cpp:392
#7  0xb45f9dfd in KMMessagePart::cte (this=0x937b404) at ../../kmail/kmmsgpart.h:157
#8  KMMessagePart::bodyDecodedBinary (this=0x937b404) at ../../kmail/kmmsgpart.cpp:255
#9  0xb47af7ff in KMHandleAttachmentCommand::createAtmFileLink (this=0xa3c6df8) at ../../kmail/kmcommands.cpp:2976
#10 0xb47b1cd4 in KMHandleAttachmentCommand::atmOpen (this=0xa3c6df8) at ../../kmail/kmcommands.cpp:3039
#11 0xb47b2260 in KMHandleAttachmentCommand::execute (this=0xa3c6df8) at ../../kmail/kmcommands.cpp:2940
#12 0xb47b01d0 in KMHandleAttachmentCommand::slotStart (this=0xa3c6df8) at ../../kmail/kmcommands.cpp:2926
#13 0xb479d29b in KMHandleAttachmentCommand::qt_metacall (this=0xa3c6df8, _c=QMetaObject::InvokeMetaMethod, _id=14, _a=0xbffa178c) at ./kmcommands.moc:2240
#14 0x00b74263 in QMetaObject::activate (sender=0xa3c63e0, from_signal_index=4, to_signal_index=4, argv=0x0) at kernel/qobject.cpp:3113
#15 0x00b74ec2 in QMetaObject::activate (sender=0xa3c63e0, m=0xc4e908, local_signal_index=0, argv=0x0) at kernel/qobject.cpp:3187
#16 0x00b79387 in QSingleShotTimer::timeout (this=0xa3c63e0) at .moc/release-shared/qtimer.moc:76
#17 0x00b7949c in QSingleShotTimer::timerEvent (this=0xa3c63e0) at kernel/qtimer.cpp:298
#18 0x00b6e3bf in QObject::event (this=0xa3c63e0, e=0xbffa1c20) at kernel/qobject.cpp:1075
#19 0x010e7f54 in QApplicationPrivate::notify_helper (this=0x90a9c50, receiver=0xa3c63e0, e=0xbffa1c20) at kernel/qapplication.cpp:4056
#20 0x010ef67c in QApplication::notify (this=0xbffa1f84, receiver=0xa3c63e0, e=0xbffa1c20) at kernel/qapplication.cpp:3603
#21 0x002e2bfa in KApplication::notify (this=0xbffa1f84, receiver=0xa3c63e0, event=0xbffa1c20) at ../../kdeui/kernel/kapplication.cpp:302
#22 0x00b5e6cb in QCoreApplication::notifyInternal (this=0xbffa1f84, receiver=0xa3c63e0, event=0xbffa1c20) at kernel/qcoreapplication.cpp:610
#23 0x00b8b7ce in QCoreApplication::sendEvent (this=0x90a2d44) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#24 QTimerInfoList::activateTimers (this=0x90a2d44) at kernel/qeventdispatcher_unix.cpp:572
#25 0x00b890e0 in timerSourceDispatch (source=0x90a2d10) at kernel/qeventdispatcher_glib.cpp:165
#26 0x07f15e78 in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#27 0x07f19720 in ?? () from /lib/libglib-2.0.so.0
#28 0x07f19853 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#29 0x00b8902c in QEventDispatcherGlib::processEvents (this=0x90819f8, flags=...) at kernel/qeventdispatcher_glib.cpp:327
#30 0x01188be5 in QGuiEventDispatcherGlib::processEvents (this=0x90819f8, flags=...) at kernel/qguieventdispatcher_glib.cpp:202
#31 0x00b5cc79 in QEventLoop::processEvents (this=0xbffa1ee4, flags=) at kernel/qeventloop.cpp:149
#32 0x00b5d0ca in QEventLoop::exec (this=0xbffa1ee4, flags=...) at kernel/qeventloop.cpp:201
#33 0x00b5f53f in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#34 0x010e7dd7 in QApplication::exec () at kernel/qapplication.cpp:3525
#35 0x0804b4e6 in main (argc=1, argv=0xbffa21a4) at ../../../kontact/src/main.cpp:218

Reported using DrKonqi