Application that crashed: kontact
Version of the application: 4.3.0 pre
KDE Version: 4.2.88 (KDE 4.2.88 (KDE 4.3 >= 20090527)) "release 135"
Qt Version: 4.5.1
Operating System: Linux 2.6.27.21-0.1-default x86_64
Distribution: "openSUSE 11.1 (x86_64)"

What I was doing when the application crashed:
I received an email with a .zip-File attached. I can open it from kmail and the archive seems fine.
When I try to save it I am asked if I want to keep the encryption and the signature of the file. This I already find odd since I am quite sure that there is neither a signature nor any encryption involved.

Anyway, when I select to not keep the signature and encryption, the file is saved empty, ie. it has 0B file size. If I choose to keep both, then Kmail crashes either after the second question (signature) and sometimes after the first. This happened in all but one cases (I tried a lot)

 -- Backtrace:
Application: Kontact (kontact), signal: Segmentation fault
[KCrash Handler]
#5  0x00007f533e5c2d3e in memcpy () from /lib64/libc.so.6
#6  0x00007f53403daca4 in QByteArray::realloc (this=0x11767b8, alloc=4) at /usr/include/bits/string3.h:52
#7  0x00007f53403db821 in QByteArray::operator= (this=0x11767b8, str=0x7f532cc10d05 "text") at tools/qbytearray.cpp:873
#8  0x00007f532c77b9e9 in KMMessagePart::clear (this=0x11767a8) at /usr/src/debug/kdepim-4.2.88svn973768/kmail/kmmsgpart.cpp:66
#9  0x00007f532c66adca in KMMessage::bodyPart (aDwBodyPart=0x13175d0, aPart=0x0, withBody=true) at /usr/src/debug/kdepim-4.2.88svn973768/kmail/kmmessage.cpp:2712
#10 0x00007f532c90e5a9 in KMSaveAttachmentsCommand::saveItem (this=0x1643710, node=0x1176780, url=@0x7fff4ce2d220) at /usr/src/debug/kdepim-4.2.88svn973768/kmail/partNode.h:99
#11 0x00007f532c90fbed in KMSaveAttachmentsCommand::slotSaveAll (this=0x1643710) at /usr/src/debug/kdepim-4.2.88svn973768/kmail/kmcommands.cpp:2526
#12 0x00007f532c91232d in KMSaveAttachmentsCommand::qt_metacall (this=0x1643710, _c=QMetaObject::InvokeMetaMethod, _id=24335208, _a=<value optimized out>)
    at /usr/src/debug/kdepim-4.2.88svn973768/build/kmail/kmcommands.moc:799
#13 0x00007f53404d6c22 in QMetaObject::activate (sender=0x1556260, from_signal_index=<value optimized out>, to_signal_index=13, argv=0x3) at kernel/qobject.cpp:3120
#14 0x00007f532c8f86a9 in KMLoadPartsCommand::execute (this=0x1735368) at /usr/src/debug/kdepim-4.2.88svn973768/kmail/kmcommands.cpp:2745
#15 0x00007f532c912b6c in KMLoadPartsCommand::slotStart (this=0x1556260) at /usr/src/debug/kdepim-4.2.88svn973768/kmail/kmcommands.cpp:2720
#16 0x00007f532c904482 in KMCommand::qt_metacall (this=0x1556260, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff4ce2daa0)
    at /usr/src/debug/kdepim-4.2.88svn973768/build/kmail/kmcommands.moc:86
#17 0x00007f532c904636 in KMLoadPartsCommand::qt_metacall (this=0x1735368, _c=QMetaObject::InvokeMetaMethod, _id=1, _a=0x3) at /usr/src/debug/kdepim-4.2.88svn973768/build/kmail/kmcommands.moc:1852
#18 0x00007f53404d6c22 in QMetaObject::activate (sender=0x1576d50, from_signal_index=<value optimized out>, to_signal_index=4, argv=0x3) at kernel/qobject.cpp:3120
#19 0x00007f53404dbf9f in QSingleShotTimer::timerEvent (this=0x1576d50) at kernel/qtimer.cpp:298
#20 0x00007f53404d0f43 in QObject::event (this=0x1576d50, e=0x0) at kernel/qobject.cpp:1082
#21 0x00007f533f1b478d in QApplicationPrivate::notify_helper (this=0x649390, receiver=0x1576d50, e=0x7fff4ce2e1a0) at kernel/qapplication.cpp:4057
#22 0x00007f533f1bca2a in QApplication::notify (this=0x7fff4ce2e5a0, receiver=0x1576d50, e=0x7fff4ce2e1a0) at kernel/qapplication.cpp:4022
#23 0x00007f53412fc04b in KApplication::notify(QObject*, QEvent*) () from /usr/lib64/libkdeui.so.5
#24 0x00007f53404c115c in QCoreApplication::notifyInternal (this=0x7fff4ce2e5a0, receiver=0x1576d50, event=0x7fff4ce2e1a0) at kernel/qcoreapplication.cpp:610
#25 0x00007f53404ee5c0 in QTimerInfoList::activateTimers (this=0x6390e0) at kernel/qcoreapplication.h:213
#26 0x00007f53404ea93d in timerSourceDispatch (source=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:164
#27 0x00007f5339d6c0fb in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0
#28 0x00007f5339d6f8cd in ?? () from /usr/lib64/libglib-2.0.so.0
#29 0x00007f5339d6fa8b in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#30 0x00007f53404ea89f in QEventDispatcherGlib::processEvents (this=0x60df60, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:324
#31 0x00007f533f24bb0f in QGuiEventDispatcherGlib::processEvents (this=0x1735368, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#32 0x00007f53404bf9f2 in QEventLoop::processEvents (this=<value optimized out>, flags={i = 1289938112}) at kernel/qeventloop.cpp:149
#33 0x00007f53404bfdbd in QEventLoop::exec (this=0x7fff4ce2e500, flags={i = 1289938192}) at kernel/qeventloop.cpp:200
#34 0x00007f53404c20a4 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#35 0x0000000000404995 in main (argc=1, argv=0x7fff4ce2ec88) at /usr/src/debug/kdepim-4.2.88svn973768/kontact/src/main.cpp:218

Reported using DrKonqi