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 2.6.28-15-generic i686
Distribution: Ubuntu 9.04

What I was doing when the application crashed:
Open an email with multiple attachments, mark 2 or more attachments, rightclick and choose save as... Boooom.

 -- Backtrace:
Application: KMail (kmail), signal: Segmentation fault
[KCrash Handler]
#6  0xb7543d83 in KMLoadPartsCommand::slotPartRetrieved () from /usr/lib/libkmailprivate.so.4
#7  0xb7545a8d in KMLoadPartsCommand::qt_metacall () from /usr/lib/libkmailprivate.so.4
#8  0xb5de71b8 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#9  0xb5de7e42 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#10 0xb759c0d9 in ?? () from /usr/lib/libkmailprivate.so.4
#11 0xb75a8d23 in ?? () from /usr/lib/libkmailprivate.so.4
#12 0xb75ad424 in ?? () from /usr/lib/libkmailprivate.so.4
#13 0xb5de71b8 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#14 0xb5de7e42 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#15 0xb7a520b3 in KJob::result () from /usr/lib/libkdecore.so.5
#16 0xb7a52559 in KJob::emitResult () from /usr/lib/libkdecore.so.5
#17 0xb6b58995 in KIO::SimpleJob::slotFinished () from /usr/lib/libkio.so.5
#18 0xb6b592d3 in KIO::TransferJob::slotFinished () from /usr/lib/libkio.so.5
#19 0xb6b5587b in KIO::TransferJob::qt_metacall () from /usr/lib/libkio.so.5
#20 0xb5de71b8 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#21 0xb5de7e42 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#22 0xb6c1e8d7 in KIO::SlaveInterface::finished () from /usr/lib/libkio.so.5
#23 0xb6c22617 in KIO::SlaveInterface::dispatch () from /usr/lib/libkio.so.5
#24 0xb6c1edb7 in KIO::SlaveInterface::dispatch () from /usr/lib/libkio.so.5
#25 0xb6c10b2d in KIO::Slave::gotInput () from /usr/lib/libkio.so.5
#26 0xb6c12fc3 in KIO::Slave::qt_metacall () from /usr/lib/libkio.so.5
#27 0xb5de71b8 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#28 0xb5de7e42 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#29 0xb6b1c697 in KIO::Connection::readyRead () from /usr/lib/libkio.so.5
#30 0xb6b1e003 in ?? () from /usr/lib/libkio.so.5
#31 0xb6b1e3e6 in KIO::Connection::qt_metacall () from /usr/lib/libkio.so.5
#32 0xb5de08cb in QMetaCallEvent::placeMetaCall () from /usr/lib/libQtCore.so.4
#33 0xb5de23b0 in QObject::event () from /usr/lib/libQtCore.so.4
#34 0xb605dd3c in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#35 0xb606603e in QApplication::notify () from /usr/lib/libQtGui.so.4
#36 0xb7d7985d in KApplication::notify () from /usr/lib/libkdeui.so.5
#37 0xb5dd1bcb in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#38 0xb5dd2825 in QCoreApplicationPrivate::sendPostedEvents () from /usr/lib/libQtCore.so.4
#39 0xb5dd2a1d in QCoreApplication::sendPostedEvents () from /usr/lib/libQtCore.so.4
#40 0xb5dfd6af in ?? () from /usr/lib/libQtCore.so.4
#41 0xb41d3b88 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#42 0xb41d70eb in ?? () from /usr/lib/libglib-2.0.so.0
#43 0xb41d7268 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#44 0xb5dfd2f8 in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#45 0xb60ffa75 in ?? () from /usr/lib/libQtGui.so.4
#46 0xb5dd01fa in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#47 0xb5dd0642 in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#48 0xb5dd2ae9 in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#49 0xb605dbb7 in QApplication::exec () from /usr/lib/libQtGui.so.4
#50 0x0804a7d0 in _start ()

Reported using DrKonqi