Application that crashed: kmail
Version of the application: 1.12.1
KDE Version: 4.3.1 (KDE 4.3.1)
Qt Version: 4.5.2
Operating System: Linux 2.6.30-1-686-bigmem i686
Distribution: Debian GNU/Linux 5.0.3 (lenny)

What I was doing when the application crashed:
Kmail crashed while downloading attachment via IMAP(SSL).
I selected save as from the ressource-selector at the bottom of the screen. Kmail crashed after ~50%.
I tried downloading the attachment about 3 times before, each time resulting in acorrupt download.

 -- Backtrace:
Application: KMail (kmail), signal: Segmentation fault
[KCrash Handler]
#6  DwString::c_str (this=0x96f67d8, msg=0x933b4f8, partSpecifier=...) at ../../mimelib/mimelib/string.h:618
#7  DwMessageComponent::partId (this=0x96f67d8, msg=0x933b4f8, partSpecifier=...) at ../../mimelib/mimelib/msgcmp.h:259
#8  KMLoadPartsCommand::slotPartRetrieved (this=0x96f67d8, msg=0x933b4f8, partSpecifier=...) at ../../kmail/kmcommands.cpp:2742
#9  0xb76115ad in KMLoadPartsCommand::qt_metacall (this=0x96f67d8, _c=QMetaObject::InvokeMetaMethod, _id=1, _a=0xbfd52278) at ./kmcommands.moc:1858
#10 0xb70bfb33 in QMetaObject::activate (sender=0x965c8a0, from_signal_index=5, to_signal_index=5, argv=0xbfd52278) at kernel/qobject.cpp:3112
#11 0xb70c0782 in QMetaObject::activate (sender=0x965c8a0, m=0xb7a354d0, local_signal_index=1, argv=0xbfd52278) at kernel/qobject.cpp:3186
#12 0xb7666649 in KMail::FolderJob::messageUpdated (this=0x965c8a0, _t1=0x933b4f8, _t2=...) at ./folderjob.moc:106
#13 0xb7672f1b in KMail::ImapJob::slotGetMessageResult (this=0x965c8a0, job=0x96ac9c8) at ../../kmail/imapjob.cpp:476
#14 0xb76774bc in KMail::ImapJob::qt_metacall (this=0x965c8a0, _c=QMetaObject::InvokeMetaMethod, _id=0, _a=0xbfd523ec) at ./imapjob.moc:82
#15 0xb70bfb33 in QMetaObject::activate (sender=0x96ac9c8, from_signal_index=7, to_signal_index=7, argv=0xbfd523ec) at kernel/qobject.cpp:3112
#16 0xb70c0782 in QMetaObject::activate (sender=0x96ac9c8, m=0xb7c75b48, local_signal_index=3, argv=0xbfd523ec) at kernel/qobject.cpp:3186
#17 0xb7b193d3 in KJob::result (this=0x96ac9c8, _t1=0x96ac9c8) at ./kjob.moc:188
#18 0xb7b19879 in KJob::emitResult (this=0x96ac9c8) at ../../kdecore/jobs/kjob.cpp:304
#19 0xb53247b5 in KIO::SimpleJob::slotFinished (this=0x96ac9c8) at ../../kio/kio/job.cpp:477
#20 0xb5325113 in KIO::TransferJob::slotFinished (this=0x96ac9c8) at ../../kio/kio/job.cpp:948
#21 0xb53216a3 in KIO::TransferJob::qt_metacall (this=0x96ac9c8, _c=QMetaObject::InvokeMetaMethod, _id=7, _a=0xbfd52628) at ./jobclasses.moc:343
#22 0xb70bfb33 in QMetaObject::activate (sender=0x9489318, from_signal_index=8, to_signal_index=8, argv=0x0) at kernel/qobject.cpp:3112
#23 0xb70c0782 in QMetaObject::activate (sender=0x9489318, m=0xb54cbb84, local_signal_index=4, argv=0x0) at kernel/qobject.cpp:3186
#24 0xb53ea437 in KIO::SlaveInterface::finished (this=0x9489318) at ./slaveinterface.moc:165
#25 0xb53ee1e7 in KIO::SlaveInterface::dispatch (this=0x9489318, _cmd=104, rawdata=...) at ../../kio/kio/slaveinterface.cpp:175
#26 0xb53ea917 in KIO::SlaveInterface::dispatch (this=0x9489318) at ../../kio/kio/slaveinterface.cpp:91
#27 0xb53dc8fd in KIO::Slave::gotInput (this=0x9489318) at ../../kio/kio/slave.cpp:322
#28 0xb53dede3 in KIO::Slave::qt_metacall (this=0x9489318, _c=QMetaObject::InvokeMetaMethod, _id=2, _a=0xbfd528f8) at ./slave.moc:76
#29 0xb70bfb33 in QMetaObject::activate (sender=0x97a9150, from_signal_index=4, to_signal_index=4, argv=0x0) at kernel/qobject.cpp:3112
#30 0xb70c0782 in QMetaObject::activate (sender=0x97a9150, m=0xb54c84c0, local_signal_index=0, argv=0x0) at kernel/qobject.cpp:3186
#31 0xb52e8937 in KIO::Connection::readyRead (this=0x97a9150) at ./connection.moc:86
#32 0xb52ea243 in KIO::ConnectionPrivate::dequeue (this=0x98aa4f0) at ../../kio/kio/connection.cpp:82
#33 0xb52ea626 in KIO::Connection::qt_metacall (this=0x97a9150, _c=QMetaObject::InvokeMetaMethod, _id=1, _a=0x94638d8) at ./connection.moc:73
#34 0xb70b933b in QMetaCallEvent::placeMetaCall (this=0x94a9540, object=0x97a9150) at kernel/qobject.cpp:477
#35 0xb70bae10 in QObject::event (this=0x97a9150, e=0x94a9540) at kernel/qobject.cpp:1110
#36 0xb66ea814 in QApplicationPrivate::notify_helper (this=0x8dbb0c8, receiver=0x97a9150, e=0x94a9540) at kernel/qapplication.cpp:4056
#37 0xb66f297e in QApplication::notify (this=0xbfd53128, receiver=0x97a9150, e=0x94a9540) at kernel/qapplication.cpp:3603
#38 0xb7e4e4ad in KApplication::notify (this=0xbfd53128, receiver=0x97a9150, event=0x94a9540) at ../../kdeui/kernel/kapplication.cpp:302
#39 0xb70aa9cb in QCoreApplication::notifyInternal (this=0xbfd53128, receiver=0x97a9150, event=0x94a9540) at kernel/qcoreapplication.cpp:610
#40 0xb70ab60e in QCoreApplication::sendEvent (receiver=0x0, event_type=0, data=0x8d94b80) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#41 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x8d94b80) at kernel/qcoreapplication.cpp:1247
#42 0xb70ab7ed in QCoreApplication::sendPostedEvents (receiver=0x0, event_type=0) at kernel/qcoreapplication.cpp:1140
#43 0xb70d5c0f in QCoreApplication::sendPostedEvents (s=0x8dbc990) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:218
#44 postEventSourceDispatch (s=0x8dbc990) at kernel/qeventdispatcher_glib.cpp:210
#45 0xb47d74b8 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#46 0xb47daa13 in ?? () from /usr/lib/libglib-2.0.so.0
#47 0xb47dab98 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#48 0xb70d5858 in QEventDispatcherGlib::processEvents (this=0x8d948d0, flags=...) at kernel/qeventdispatcher_glib.cpp:327
#49 0xb6789fd5 in QGuiEventDispatcherGlib::processEvents (this=0x8d948d0, flags=...) at kernel/qguieventdispatcher_glib.cpp:202
#50 0xb70a901a in QEventLoop::processEvents (this=0xbfd53030, flags=...) at kernel/qeventloop.cpp:149
#51 0xb70a9462 in QEventLoop::exec (this=0xbfd53030, flags=...) at kernel/qeventloop.cpp:201
#52 0xb70ab8b9 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#53 0xb66ea697 in QApplication::exec () at kernel/qapplication.cpp:3525
#54 0x0804a6d0 in main (argc=-1252673920, argv=0x975dce8) at ../../kmail/main.cpp:146

Reported using DrKonqi