Version:           1.4 (using KDE 4.2.0)
Installed from:    Ubuntu Packages

I searched for some messages then I opened the search folder, selected a bunch of them and dragged them over another folder. Kontact/kmail crashed when doing that.

Backtrace:
Application: Kontact (kontact), signal SIGSEGV

Thread 1 (Thread 0xb4aed6c0 (LWP 12229)):
[KCrash Handler]
#6  0xb1454a60 in KMAcctImap::ignoreJobsForMessage (this=0xa4be898, msg=0xacbbf30) at /build/buildd/kdepim-4.2.0/kmail/kmacctimap.cpp:217
#7  0xb146d4a5 in KMFolderImap::ignoreJobsForMessage (this=0xa240c00, msg=0xacbbf30) at /build/buildd/kdepim-4.2.0/kmail/kmfolderimap.cpp:1562
#8  0xb158e3be in KMMoveCommand::execute (this=0xaea6ff0) at /build/buildd/kdepim-4.2.0/kmail/kmcommands.cpp:2086
#9  0xb1571662 in KMCommand::slotPostTransfer (this=0xaea6ff0, result=KMCommand::OK) at /build/buildd/kdepim-4.2.0/kmail/kmcommands.cpp:276
#10 0xb157cf94 in KMCommand::qt_metacall (this=0xaea6ff0, _c=QMetaObject::InvokeMetaMethod, _id=5, _a=0xbfdafbac) at /build/buildd/kdepim-4.2.0/obj-i486-linux-gnu/kmail/kmcommands.moc:86
#11 0xb159029a in KMMoveCommand::qt_metacall (this=0xaea6ff0, _c=QMetaObject::InvokeMetaMethod, _id=9, _a=0xbfdafbac) at /build/buildd/kdepim-4.2.0/obj-i486-linux-gnu/kmail/kmcommands.moc:1662
#12 0xb5d3ea60 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#13 0xb5d3f7e2 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#14 0xb156dd13 in KMCommand::messagesTransfered (this=0xaea6ff0, _t1=KMCommand::OK) at /build/buildd/kdepim-4.2.0/obj-i486-linux-gnu/kmail/kmcommands.moc:100
#15 0xb158cbec in KMCommand::transferSelectedMsgs (this=0xaea6ff0) at /build/buildd/kdepim-4.2.0/kmail/kmcommands.cpp:370
#16 0xb158ce3f in KMCommand::slotStart (this=0xaea6ff0) at /build/buildd/kdepim-4.2.0/kmail/kmcommands.cpp:268
#17 0xb157cfa3 in KMCommand::qt_metacall (this=0xaea6ff0, _c=QMetaObject::InvokeMetaMethod, _id=4, _a=0xbfdafd88) at /build/buildd/kdepim-4.2.0/obj-i486-linux-gnu/kmail/kmcommands.moc:85
#18 0xb159029a in KMMoveCommand::qt_metacall (this=0xaea6ff0, _c=QMetaObject::InvokeMetaMethod, _id=8, _a=0xbfdafd88) at /build/buildd/kdepim-4.2.0/obj-i486-linux-gnu/kmail/kmcommands.moc:1662
#19 0xb5d3ea60 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#20 0xb5d3f7e2 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#21 0xb5d44db7 in ?? () from /usr/lib/libQtCore.so.4
#22 0xb5d44edc in ?? () from /usr/lib/libQtCore.so.4
#23 0xb5d3953f in QObject::event () from /usr/lib/libQtCore.so.4
#24 0xb61db8ec in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#25 0xb61e372e in QApplication::notify () from /usr/lib/libQtGui.so.4
#26 0xb6cf4fed in KApplication::notify (this=0xbfdb04c8, receiver=0xaab9648, event=0xbfdb021c) at /build/buildd/kde4libs-4.2.0/kdeui/kernel/kapplication.cpp:307
#27 0xb5d29e61 in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#28 0xb5d57d81 in ?? () from /usr/lib/libQtCore.so.4
#29 0xb5d54520 in ?? () from /usr/lib/libQtCore.so.4
#30 0xb50046f8 in IA__g_main_context_dispatch (context=0x9e41e98) at /build/buildd/glib2.0-2.18.2/glib/gmain.c:2144
#31 0xb5007da3 in g_main_context_iterate (context=0x9e41e98, block=1, dispatch=1, self=0x9e46a50) at /build/buildd/glib2.0-2.18.2/glib/gmain.c:2778
#32 0xb5007f61 in IA__g_main_context_iteration (context=0x9e41e98, may_block=1) at /build/buildd/glib2.0-2.18.2/glib/gmain.c:2841
#33 0xb5d54478 in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#34 0xb6275ea5 in ?? () from /usr/lib/libQtGui.so.4
#35 0xb5d2852a in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#36 0xb5d286ea in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#37 0xb5d2ada5 in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#38 0xb61db767 in QApplication::exec () from /usr/lib/libQtGui.so.4
#39 0x0804c072 in main (argc=1, argv=0xbfdb07c4) at /build/buildd/kdepim-4.2.0/kontact/src/main.cpp:218

Versions:
$ kontact -v
Qt: 4.4.3
KDE: 4.2.00 (KDE 4.2.0)
Kontact: 1.4

$ kmail -v
Qt: 4.4.3
KDE: 4.2.00 (KDE 4.2.0)
KMail: 1.11.0

Please let me know if you require additional info.
Thanks.