Version:            (using KDE 4.2.90)
OS:                Linux
Installed from:    Ubuntu Packages

Does not occured since i'm using the 4.3 beta. Occured many times with 4.2. Sorry, not reproductible yet but stacktrace:

Application: KMail (kmail), signal: Segmentation fault
[KCrash Handler]
#6  KMail::FolderJob::msgList (this=0xaacd020) at /usr/include/qt4/QtCore/qatomic_i386.h:120
#7  0xb754138b in KMAcctImap::ignoreJobsForMessage (this=0x9801ce0, msg=0xb2660f0) at /build/buildd/kdepim-4.2.90/kmail/kmacctimap.cpp:215
#8  0xb7559165 in KMFolderImap::ignoreJobsForMessage (this=0x9967418, msg=0xb2660f0) at /build/buildd/kdepim-4.2.90/kmail/kmfolderimap.cpp:1564
#9  0xb76721ee in KMMoveCommand::execute (this=0xb06fa48) at /build/buildd/kdepim-4.2.90/kmail/kmcommands.cpp:2084
#10 0xb7657052 in KMCommand::slotPostTransfer (this=0xb06fa48, result=KMCommand::OK) at /build/buildd/kdepim-4.2.90/kmail/kmcommands.cpp:273
#11 0xb7661124 in KMCommand::qt_metacall (this=0xb06fa48, _c=QMetaObject::InvokeMetaMethod, _id=5, _a=0xbfa9115c) at /build/buildd/kdepim-4.2.90/obj-i486-linux-gnu/kmail/kmcommands.moc:87
#12 0xb767400a in KMMoveCommand::qt_metacall (this=0xb06fa48, _c=QMetaObject::InvokeMetaMethod, _id=9, _a=0xbfa9115c) at /build/buildd/kdepim-4.2.90/obj-i486-linux-gnu/kmail/kmcommands.moc:1706
#13 0xb76740d2 in KMDeleteMsgCommand::qt_metacall (this=0xb06fa48, _c=QMetaObject::InvokeMetaMethod, _id=9, _a=0xbfa9115c) at /build/buildd/kdepim-4.2.90/obj-i486-linux-gnu/kmail/kmcommands.moc:1758
#14 0xb6006ca8 in QMetaObject::activate (sender=0xb06fa48, from_signal_index=4, to_signal_index=4, argv=0xbfa9115c) at kernel/qobject.cpp:3069
#15 0xb6007932 in QMetaObject::activate (sender=0xb06fa48, m=0xb7a91614, local_signal_index=0, argv=0xbfa9115c) at kernel/qobject.cpp:3143
#16 0xb7652ff3 in KMCommand::messagesTransfered (this=0xb06fa48, _t1=KMCommand::OK) at /build/buildd/kdepim-4.2.90/obj-i486-linux-gnu/kmail/kmcommands.moc:102
#17 0xb7670aec in KMCommand::transferSelectedMsgs (this=0xb06fa48) at /build/buildd/kdepim-4.2.90/kmail/kmcommands.cpp:367
#18 0xb7670d43 in KMCommand::slotStart (this=0xb06fa48) at /build/buildd/kdepim-4.2.90/kmail/kmcommands.cpp:265
#19 0xb7661133 in KMCommand::qt_metacall (this=0xb06fa48, _c=QMetaObject::InvokeMetaMethod, _id=4, _a=0xbfa91358) at /build/buildd/kdepim-4.2.90/obj-i486-linux-gnu/kmail/kmcommands.moc:86
#20 0xb767400a in KMMoveCommand::qt_metacall (this=0xb06fa48, _c=QMetaObject::InvokeMetaMethod, _id=8, _a=0xbfa91358) at /build/buildd/kdepim-4.2.90/obj-i486-linux-gnu/kmail/kmcommands.moc:1706
#21 0xb76740d2 in KMDeleteMsgCommand::qt_metacall (this=0xb06fa48, _c=QMetaObject::InvokeMetaMethod, _id=8, _a=0xbfa91358) at /build/buildd/kdepim-4.2.90/obj-i486-linux-gnu/kmail/kmcommands.moc:1758
#22 0xb6006ca8 in QMetaObject::activate (sender=0xb89e5c8, from_signal_index=4, to_signal_index=4, argv=0x0) at kernel/qobject.cpp:3069
#23 0xb6007932 in QMetaObject::activate (sender=0xb89e5c8, m=0xb60e2908, local_signal_index=0, argv=0x0) at kernel/qobject.cpp:3143
#24 0xb600c0a7 in QSingleShotTimer::timeout (this=0xb89e5c8) at .moc/release-shared/qtimer.moc:76
#25 0xb600c1cc in QSingleShotTimer::timerEvent (this=0xb89e5c8) at kernel/qtimer.cpp:298
#26 0xb600115f in QObject::event (this=0xb89e5c8, e=0xbfa917dc) at kernel/qobject.cpp:1082
#27 0xb629ee9c in QApplicationPrivate::notify_helper (this=0x9494150, receiver=0xb89e5c8, e=0xbfa917dc) at kernel/qapplication.cpp:4084
#28 0xb62a719e in QApplication::notify (this=0xbfa91af8, receiver=0xb89e5c8, e=0xbfa917dc) at kernel/qapplication.cpp:3631
#29 0xb7e93e8d in KApplication::notify (this=0xbfa91af8, receiver=0xb89e5c8, event=0xbfa917dc) at /build/buildd/kde4libs-4.2.90/kdeui/kernel/kapplication.cpp:302
#30 0xb5ff0a3b in QCoreApplication::notifyInternal (this=0xbfa91af8, receiver=0xb89e5c8, event=0xbfa917dc) at kernel/qcoreapplication.cpp:602
#31 0xb601fd71 in QTimerInfoList::activateTimers (this=0x9539f74) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#32 0xb601c4e0 in timerSourceDispatch (source=0x9539f40) at kernel/qeventdispatcher_glib.cpp:164
#33 0xb43c4b88 in IA__g_main_context_dispatch (context=0x9493e98) at /build/buildd/glib2.0-2.20.1/glib/gmain.c:1814
#34 0xb43c80eb in g_main_context_iterate (context=0x9493e98, block=1, dispatch=1, self=0x9492f38) at /build/buildd/glib2.0-2.20.1/glib/gmain.c:2448
#35 0xb43c8268 in IA__g_main_context_iteration (context=0x9493e98, may_block=1) at /build/buildd/glib2.0-2.20.1/glib/gmain.c:2511
#36 0xb601c438 in QEventDispatcherGlib::processEvents (this=0x948f9b0, flags={i = -1079436968}) at kernel/qeventdispatcher_glib.cpp:323
#37 0xb6340365 in QGuiEventDispatcherGlib::processEvents (this=0x948f9b0, flags={i = -1079436920}) at kernel/qguieventdispatcher_glib.cpp:202
#38 0xb5fef06a in QEventLoop::processEvents (this=0xbfa91a00, flags={i = -1079436856}) at kernel/qeventloop.cpp:149
#39 0xb5fef4aa in QEventLoop::exec (this=0xbfa91a00, flags={i = -1079436792}) at kernel/qeventloop.cpp:200
#40 0xb5ff1959 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:880
#41 0xb629ed17 in QApplication::exec () at kernel/qapplication.cpp:3553
#42 0x0804a7b0 in main (argc=) at /build/buildd/kdepim-4.2.90/kmail/main.cpp:146