Version:           1.11.4 (using KDE 4.2.4)
OS:                Linux
Installed from:    Debian testing/unstable Packages

KMail crashes when I delete mails from dIMAP accounts

I've got two different Backtraces:

Anwendung: KMail (kmail), Signal SIGSEGV
[Current thread is 1 (Thread 0xb3e95710 (LWP 27927))]

Thread 1 (Thread 0xb3e95710 (LWP 27927)):
[KCrash Handler]
#6  0xb74fc36d in KMFolderCachedImap::findByUID (this=0x9c9e6d8, uid=104197) at ../../kmail/kmfoldercachedimap.cpp:684
#7  0xb751368f in KMFolderCachedImap::slotGetMessagesData (this=0x9c9e6d8, job=0xa7d89b8, data=@0xbfee55c4) at ../../kmail/kmfoldercachedimap.cpp:1846
#8  0xb7516c5e in KMFolderCachedImap::qt_metacall (this=0x9c9e6d8, _c=QMetaObject::InvokeMetaMethod, _id=3, _a=0xbfee5318) at ./kmfoldercachedimap.moc:201
#9  0xb7078b98 in QMetaObject::activate (sender=0xa7d89b8, from_signal_index=40, to_signal_index=40, argv=0xbfee5318) at kernel/qobject.cpp:3120
#10 0xb7079822 in QMetaObject::activate (sender=0xa7d89b8, m=0xb51add30, local_signal_index=0, argv=0xbfee5318) at kernel/qobject.cpp:3194
#11 0xb4ffc6d9 in KIO::TransferJob::data (this=0xa7d89b8, _t1=0xa7d89b8, _t2=@0xbfee55c4) at ./jobclasses.moc:364
#12 0xb4ffcfe2 in KIO::TransferJob::slotData (this=0xa7d89b8, _data=@0xbfee55c4) at ../../kio/kio/job.cpp:921
#13 0xb5008195 in KIO::TransferJob::qt_metacall (this=0xa7d89b8, _c=QMetaObject::InvokeMetaMethod, _id=8, _a=0xbfee543c) at ./jobclasses.moc:344
#14 0xb7078b98 in QMetaObject::activate (sender=0xa4c8b90, from_signal_index=4, to_signal_index=4, argv=0xbfee543c) at kernel/qobject.cpp:3120
#15 0xb7079822 in QMetaObject::activate (sender=0xa4c8b90, m=0xb51b0804, local_signal_index=0, argv=0xbfee543c) at kernel/qobject.cpp:3194
#16 0xb50c5843 in KIO::SlaveInterface::data (this=0xa4c8b90, _t1=@0xbfee55c4) at ./slaveinterface.moc:140
#17 0xb50c958c in KIO::SlaveInterface::dispatch (this=0xa4c8b90, _cmd=100, rawdata=@0xbfee55c4) at ../../kio/kio/slaveinterface.cpp:163
#18 0xb50c5c07 in KIO::SlaveInterface::dispatch (this=0xa4c8b90) at ../../kio/kio/slaveinterface.cpp:91
#19 0xb50b5fbd in KIO::Slave::gotInput (this=0xa4c8b90) at ../../kio/kio/slave.cpp:322
#20 0xb50b8513 in KIO::Slave::qt_metacall (this=0xa4c8b90, _c=QMetaObject::InvokeMetaMethod, _id=2, _a=0xbfee56d8) at ./slave.moc:76
#21 0xb7078b98 in QMetaObject::activate (sender=0xa3a6e90, from_signal_index=4, to_signal_index=4, argv=0x0) at kernel/qobject.cpp:3120
#22 0xb7079822 in QMetaObject::activate (sender=0xa3a6e90, m=0xb51ad2e0, local_signal_index=0, argv=0x0) at kernel/qobject.cpp:3194
#23 0xb4fcc287 in KIO::Connection::readyRead (this=0xa3a6e90) at ./connection.moc:86
#24 0xb4fcdbe3 in KIO::ConnectionPrivate::dequeue (this=0xa488b70) at ../../kio/kio/connection.cpp:82
#25 0xb4fcdfc6 in KIO::Connection::qt_metacall (this=0xa3a6e90, _c=QMetaObject::InvokeMetaMethod, _id=1, _a=0xa5595a0) at ./connection.moc:73
#26 0xb70717eb in QMetaCallEvent::placeMetaCall (this=0xa77ebd0, object=0xa3a6e90) at kernel/qobject.cpp:489
#27 0xb7073290 in QObject::event (this=0xa3a6e90, e=0xa77ebd0) at kernel/qobject.cpp:1118
#28 0xb66697bc in QApplicationPrivate::notify_helper (this=0x9a74348, receiver=0xa3a6e90, e=0xa77ebd0) at kernel/qapplication.cpp:4057
#29 0xb6671ace in QApplication::notify (this=0xbfee5f08, receiver=0xa3a6e90, e=0xa77ebd0) at kernel/qapplication.cpp:3604
#30 0xb7e005ed in KApplication::notify (this=0xbfee5f08, receiver=0xa3a6e90, event=0xa77ebd0) at ../../kdeui/kernel/kapplication.cpp:307
#31 0xb7062a2b in QCoreApplication::notifyInternal (this=0xbfee5f08, receiver=0xa3a6e90, event=0xa77ebd0) at kernel/qcoreapplication.cpp:610
#32 0xb7063685 in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x9a4de78) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#33 0xb706387d in QCoreApplication::sendPostedEvents (receiver=0x0, event_type=0) at kernel/qcoreapplication.cpp:1140
#34 0xb708e74f in postEventSourceDispatch (s=0x9a75b90) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:218
#35 0xb47bf848 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#36 0xb47c2dab in ?? () from /usr/lib/libglib-2.0.so.0
#37 0x09a75b10 in ?? ()
#38 0x00000000 in ?? ()

---------------------------------------------------

Anwendung: KMail (kmail), Signal SIGSEGV
[Current thread is 1 (Thread 0xb3e1b710 (LWP 19272))]

Thread 1 (Thread 0xb3e1b710 (LWP 19272)):
[KCrash Handler]
#6  KMail::MessageListView::Core::Model::index (this=0x9b37678, item=0xa3b1fb0, column=0) at ../../kmail/messagelistview/core/item.h:284
#7  0xb77137a5 in KMail::MessageListView::Core::Model::viewItemJobStep (this=0x9b37678) at ../../kmail/messagelistview/core/model.cpp:3878
#8  0xb7294583 in KMail::MessageListView::Core::Model::qt_metacall (this=0x9b37678, _c=QMetaObject::InvokeMetaMethod, _id=0, _a=0xbfd6b5e8) at moc_model.cpp:76
#9  0xb6ffeb98 in QMetaObject::activate (sender=0x9b27e30, from_signal_index=4, to_signal_index=4, argv=0x0) at kernel/qobject.cpp:3120
#10 0xb6fff822 in QMetaObject::activate (sender=0x9b27e30, m=0xb70daae4, local_signal_index=0, argv=0x0) at kernel/qobject.cpp:3194
#11 0xb703a5d7 in QTimer::timeout (this=0x9b27e30) at .moc/release-shared/moc_qtimer.cpp:128
#12 0xb700467e in QTimer::timerEvent (this=0x9b27e30, e=0xbfd6ba6c) at kernel/qtimer.cpp:261
#13 0xb6ff904f in QObject::event (this=0x9b27e30, e=0xbfd6ba6c) at kernel/qobject.cpp:1082
#14 0xb65ef7bc in QApplicationPrivate::notify_helper (this=0x9888348, receiver=0x9b27e30, e=0xbfd6ba6c) at kernel/qapplication.cpp:4057
#15 0xb65f7ace in QApplication::notify (this=0xbfd6bd88, receiver=0x9b27e30, e=0xbfd6ba6c) at kernel/qapplication.cpp:3604
#16 0xb7d865ed in KApplication::notify (this=0xbfd6bd88, receiver=0x9b27e30, event=0xbfd6ba6c) at ../../kdeui/kernel/kapplication.cpp:307
#17 0xb6fe8a2b in QCoreApplication::notifyInternal (this=0xbfd6bd88, receiver=0x9b27e30, event=0xbfd6ba6c) at kernel/qcoreapplication.cpp:610
#18 0xb7017e41 in QTimerInfoList::activateTimers (this=0x988a9a4) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#19 0xb7014440 in timerSourceDispatch (source=0x988a970) at kernel/qeventdispatcher_glib.cpp:164
#20 0xb4745848 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#21 0xb4748dab in ?? () from /usr/lib/libglib-2.0.so.0
#22 0x09889b10 in ?? ()
#23 0x00000000 in ?? ()