Application that crashed: kmail
Version of the application: 1.12.2
KDE Version: 4.3.2 (KDE 4.3.2)
Qt Version: 4.5.2
Operating System: Linux 2.6.31-20-generic x86_64
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
i click on a folder on the imap server and kmail starts searching for messages (empty folder) and crashed.

 -- Backtrace:
Application: KMail (kmail), signal: Segmentation fault
The current source language is "auto; currently c".
[KCrash Handler]
#5  0x00007f9b799c0a10 in vtable for DwString () from /usr/lib/libmimelib.so.4
#6  0x00007f9b8057729a in KMReaderWin::parseMsg (this=0x1cfa170, aMsg=0x290d200) at ../../kmail/kmreaderwin.cpp:1681
#7  0x00007f9b80564eda in KMReaderWin::displayMessage (this=0x1cfa170) at ../../kmail/kmreaderwin.cpp:1605
#8  0x00007f9b805650b4 in KMReaderWin::updateReaderWin (this=0x1cfa170) at ../../kmail/kmreaderwin.cpp:1545
#9  0x00007f9b8056ffac in KMReaderWin::setMsg (this=0x1cfa170, aMsg=0x290d200, force=true) at ../../kmail/kmreaderwin.cpp:1347
#10 0x00007f9b80570dc4 in KMReaderWin::slotMessageArrived (this=0x1cfa170, msg=0x290d200) at ../../kmail/kmreaderwin.cpp:935
#11 0x00007f9b80571164 in KMReaderWin::qt_metacall (this=0x1cfa170, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff9af41310) at ./kmreaderwin.moc:196
#12 0x00007f9b7f1abddc in QMetaObject::activate (sender=0x19e1140, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0x1) at kernel/qobject.cpp:3113
#13 0x00007f9b8075ed9f in KMail::FolderJob::messageRetrieved (this=0x290d200, _t1=0x290d200) at ./folderjob.moc:99
#14 0x00007f9b8076ac97 in KMail::ImapJob::slotGetMessageResult (this=0x19e1140, job=<value optimized out>) at ../../kmail/imapjob.cpp:460
#15 0x00007f9b8076f04b in KMail::ImapJob::qt_metacall (this=0x19e1140, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff9af41510) at ./imapjob.moc:82
#16 0x00007f9b7f1abddc in QMetaObject::activate (sender=0x658afd0, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0x1) at kernel/qobject.cpp:3113
#17 0x00007f9b80e34af2 in KJob::result (this=0x290d200, _t1=0x658afd0) at ./kjob.moc:188
#18 0x00007f9b80e34e6f in KJob::emitResult (this=0x658afd0) at ../../kdecore/jobs/kjob.cpp:304
#19 0x00007f9b78f54d93 in KIO::SimpleJob::slotFinished (this=0x658afd0) at ../../kio/kio/job.cpp:477
#20 0x00007f9b78f55253 in KIO::TransferJob::slotFinished (this=0x658afd0) at ../../kio/kio/job.cpp:948
#21 0x00007f9b78f53b61 in KIO::TransferJob::qt_metacall (this=0x658afd0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff9af41930) at ./jobclasses.moc:343
#22 0x00007f9b7f1abddc in QMetaObject::activate (sender=0x28377c0, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0x1) at kernel/qobject.cpp:3113
#23 0x00007f9b79015a81 in KIO::SlaveInterface::dispatch (this=0x28377c0, _cmd=104, rawdata=...) at ../../kio/kio/slaveinterface.cpp:175
#24 0x00007f9b79012333 in KIO::SlaveInterface::dispatch (this=0x28377c0) at ../../kio/kio/slaveinterface.cpp:91
#25 0x00007f9b7900514d in KIO::Slave::gotInput (this=0x28377c0) at ../../kio/kio/slave.cpp:322
#26 0x00007f9b7900726c in KIO::Slave::qt_metacall (this=0x28377c0, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff9af41cf0) at ./slave.moc:76
#27 0x00007f9b7f1abddc in QMetaObject::activate (sender=0x2aa2730, from_signal_index=<value optimized out>, to_signal_index=<value optimized out>, argv=0x1) at kernel/qobject.cpp:3113
#28 0x00007f9b78f21f57 in KIO::ConnectionPrivate::dequeue (this=0x28060f0) at ../../kio/kio/connection.cpp:82
#29 0x00007f9b78f2207d in KIO::Connection::qt_metacall (this=0x2aa2730, _c=QMetaObject::InvokeMetaMethod, _id=<value optimized out>, _a=0x9deb4e0) at ./connection.moc:73
#30 0x00007f9b7f1a60f9 in QObject::event (this=0x2aa2730, e=0x2b3b640) at kernel/qobject.cpp:1111
#31 0x00007f9b7f629efc in QApplicationPrivate::notify_helper (this=0x19e2390, receiver=0x2aa2730, e=0x2b3b640) at kernel/qapplication.cpp:4056
#32 0x00007f9b7f6311ce in QApplication::notify (this=0x7fff9af427c0, receiver=0x2aa2730, e=0x2b3b640) at kernel/qapplication.cpp:4021
#33 0x00007f9b813ecab6 in KApplication::notify (this=0x7fff9af427c0, receiver=0x2aa2730, event=0x2b3b640) at ../../kdeui/kernel/kapplication.cpp:302
#34 0x00007f9b7f196c2c in QCoreApplication::notifyInternal (this=0x7fff9af427c0, receiver=0x2aa2730, event=0x2b3b640) at kernel/qcoreapplication.cpp:610
#35 0x00007f9b7f19780a in QCoreApplication::sendEvent (receiver=0x0, event_type=<value optimized out>, data=0x197cd00) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
#36 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=<value optimized out>, data=0x197cd00) at kernel/qcoreapplication.cpp:1247
#37 0x00007f9b7f1bf533 in QCoreApplication::sendPostedEvents (s=<value optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:218
#38 postEventSourceDispatch (s=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:210
#39 0x00007f9b7642fbce in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#40 0x00007f9b76433598 in ?? () from /lib/libglib-2.0.so.0
#41 0x00007f9b764336c0 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#42 0x00007f9b7f1bf1a6 in QEventDispatcherGlib::processEvents (this=0x197c930, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:327
#43 0x00007f9b7f6be4be in QGuiEventDispatcherGlib::processEvents (this=0x290d200, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#44 0x00007f9b7f195532 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#45 0x00007f9b7f195904 in QEventLoop::exec (this=0x7fff9af425f0, flags=) at kernel/qeventloop.cpp:201
#46 0x00007f9b7f197ab9 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#47 0x0000000000402fe9 in main (argc=<value optimized out>, argv=<value optimized out>) at ../../kmail/main.cpp:146

Reported using DrKonqi