kmail crashes when adding an attachment. Occurs with new messages or replying 
to an existing message. Same crash with a .jpg a .txt and a .doc file. 
Backtrace:

Application: KMail (kmail), signal SIGABRT
Using host libthread_db library "/lib/libthread_db.so.1".
[Thread debugging using libthread_db enabled]
[New Thread -1208912176 (LWP 2960)]
[New Thread -1258255472 (LWP 3394)]
[KCrash handler]
#6  0x00110402 in __kernel_vsyscall ()
#7  0x017f7690 in raise () from /lib/libc.so.6
#8  0x017f8f91 in abort () from /lib/libc.so.6
#9  0x017f093e in __assert_fail () from /lib/libc.so.6
#10 0x00c3e3a9 in KMComposeWin::slotAttachFileResult (this=0x901c8d0, 
    job=0x914c920)
    at /home/kde-devel/kde/src/kdepim/kmail/kmcomposewin.cpp:2300
#11 0x00c42f9f in KMComposeWin::qt_metacall (this=0x901c8d0, 
    _c=QMetaObject::InvokeMetaMethod, _id=75, _a=0xbfdec8fc)
    at /home/kde-devel/kde/build/kdepim/kmail/kmcomposewin.moc:306
#12 0x0026ae61 in QMetaObject::activate (sender=0x914c920, 
    from_signal_index=7, to_signal_index=7, argv=0xbfdec8fc)
    at kernel/qobject.cpp:3007
#13 0x0026b2e3 in QMetaObject::activate (sender=0x914c920, m=0x66c9a8, 
    local_signal_index=3, argv=0xbfdec8fc) at kernel/qobject.cpp:3080
#14 0x005557da in KJob::result (this=0x914c920, _t1=0x914c920)
    at /home/kde-devel/kde/build/kdelibs/kdecore/kjob.moc:186
#15 0x00555d5a in KJob::emitResult (this=0x914c920)
    at /home/kde-devel/kde/src/kdelibs/kdecore/jobs/kjob.cpp:290
#16 0x04e7c7c3 in KIO::SimpleJob::slotFinished (this=0x914c920)
    at /home/kde-devel/kde/src/kdelibs/kio/kio/job.cpp:498
#17 0x04e7cb9c in KIO::TransferJob::slotFinished (this=0x914c920)
    at /home/kde-devel/kde/src/kdelibs/kio/kio/job.cpp:967
#18 0x04e83bdf in KIO::TransferJob::qt_metacall (this=0x914c920, 
    _c=QMetaObject::InvokeMetaMethod, _id=7, _a=0xbfdecb34)
    at /home/kde-devel/kde/build/kdelibs/kio/jobclasses.moc:336
#19 0x0026ae61 in QMetaObject::activate (sender=0x8847568, 
    from_signal_index=8, to_signal_index=8, argv=0x0)
    at kernel/qobject.cpp:3007
#20 0x0026b2e3 in QMetaObject::activate (sender=0x8847568, m=0x4ffee84, 
    local_signal_index=4, argv=0x0) at kernel/qobject.cpp:3080
#21 0x04f2abbd in KIO::SlaveInterface::finished (this=0x8847568)
    at /home/kde-devel/kde/build/kdelibs/kio/slaveinterface.moc:163
#22 0x04f2caaa in KIO::SlaveInterface::dispatch (this=0x8847568, _cmd=104, 
    rawdata=@0xbfdecd14)
    at /home/kde-devel/kde/src/kdelibs/kio/kio/slaveinterface.cpp:176
#23 0x04f2d691 in KIO::SlaveInterface::dispatch (this=0x8847568)
    at /home/kde-devel/kde/src/kdelibs/kio/kio/slaveinterface.cpp:91
#24 0x04f1ed02 in KIO::Slave::gotInput (this=0x8847568)
    at /home/kde-devel/kde/src/kdelibs/kio/kio/slave.cpp:319
#25 0x04f20176 in KIO::Slave::qt_metacall (this=0x8847568, 
    _c=QMetaObject::InvokeMetaMethod, _id=2, _a=0xbfdece04)
    at /home/kde-devel/kde/build/kdelibs/kio/slave.moc:75
#26 0x0026ae61 in QMetaObject::activate (sender=0x8847550, 
    from_signal_index=4, to_signal_index=4, argv=0x0)
    at kernel/qobject.cpp:3007
#27 0x0026b2e3 in QMetaObject::activate (sender=0x8847550, m=0x4ffbae0, 
    local_signal_index=0, argv=0x0) at kernel/qobject.cpp:3080
#28 0x04e4a74f in KIO::Connection::readyRead (this=0x8847550)
    at /home/kde-devel/kde/build/kdelibs/kio/connection.moc:84
#29 0x04e4b743 in KIO::ConnectionPrivate::dequeue (this=0x8a384a8)
    at /home/kde-devel/kde/src/kdelibs/kio/kio/connection.cpp:82
#30 0x04e4c671 in KIO::Connection::qt_metacall (this=0x8847550, 
    _c=QMetaObject::InvokeMetaMethod, _id=1, _a=0x92be500)
    at /home/kde-devel/kde/build/kdelibs/kio/connection.moc:72
#31 0x002654f6 in QMetaCallEvent::placeMetaCall (this=0x914a8a8, 
    object=0x8847550) at kernel/qobject.cpp:535
#32 0x0026a194 in QObject::event (this=0x8847550, e=0x914a8a8)
    at kernel/qobject.cpp:1137
#33 0x0298bd07 in QApplicationPrivate::notify_helper (this=0x813e258, 
    receiver=0x8847550, e=0x914a8a8) at kernel/qapplication.cpp:3772
#34 0x0298c020 in QApplication::notify (this=0xbfded7ec, receiver=0x8847550, 
    e=0x914a8a8) at kernel/qapplication.cpp:3366
#35 0x013cf639 in KApplication::notify (this=0xbfded7ec, receiver=0x8847550, 
    event=0x914a8a8)
    at /home/kde-devel/kde/src/kdelibs/kdeui/kernel/kapplication.cpp:311
#36 0x00256bb2 in QCoreApplication::notifyInternal (this=0xbfded7ec, 
    receiver=0x8847550, event=0x914a8a8) at kernel/qcoreapplication.cpp:583
#37 0x0025a63b in QCoreApplication::sendEvent (receiver=0x8847550, 
    event=0x914a8a8)
    at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:215
#38 0x002570ca in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, 
    event_type=0, data=0x8126668) at kernel/qcoreapplication.cpp:1195
#39 0x0025727b in QCoreApplication::sendPostedEvents (receiver=0x0, 
    event_type=0) at kernel/qcoreapplication.cpp:1091
#40 0x0028755e in QCoreApplication::sendPostedEvents ()
    at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:220
#41 0x0028650f in postEventSourceDispatch (s=0x8140700)
    at kernel/qeventdispatcher_glib.cpp:211
#42 0x021291ac in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#43 0x0212c5ef in ?? () from /lib/libglib-2.0.so.0
#44 0x0212cb55 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#45 0x00285be4 in QEventDispatcherGlib::processEvents (this=0x813ae60, 
    flags=@0xbfded648) at kernel/qeventdispatcher_glib.cpp:325
#46 0x02a33db4 in QGuiEventDispatcherGlib::processEvents (this=0x813ae60, 
    flags=@0xbfded678) at kernel/qguieventdispatcher_glib.cpp:204
#47 0x0025370e in QEventLoop::processEvents (this=0xbfded6f0, 
    flags=@0xbfded6b4) at kernel/qeventloop.cpp:149
#48 0x0025394d in QEventLoop::exec (this=0xbfded6f0, flags=@0xbfded6f8)
    at kernel/qeventloop.cpp:196
#49 0x0025739b in QCoreApplication::exec () at kernel/qcoreapplication.cpp:845
#50 0x0298ba04 in QApplication::exec () at kernel/qapplication.cpp:3304
#51 0x0804b05c in main (argc=3, argv=0xbfded8c4)
    at /home/kde-devel/kde/src/kdepim/kmail/main.cpp:146
#0  0x00110402 in __kernel_vsyscall ()