Application that crashed: kmail
Version of the application: 1.11.90
KDE Version: 4.2.87 (KDE 4.2.87 (KDE 4.3 >= 20090519))
Qt Version: 4.5.1
Operating System: Linux 2.6.30-ARCH i686

What I was doing when the application crashed:
In fact there are a few reports similar to mine.  I selected a bunch of messages in reverse order, hit delete and kmail crashed.

 -- Backtrace:
Application: KMail (kmail), signal: Segmentation fault
[KCrash Handler]
#6  0xb760c66d in KMail::FolderJob::msgList () from /usr/lib/libkmailprivate.so.4
#7  0xb749353d in KMAcctImap::ignoreJobsForMessage () from /usr/lib/libkmailprivate.so.4
#8  0xb74aa773 in KMFolderImap::ignoreJobsForMessage () from /usr/lib/libkmailprivate.so.4
#9  0xb75c716c in KMMoveCommand::execute () from /usr/lib/libkmailprivate.so.4
#10 0xb75ab8da in KMCommand::slotPostTransfer () from /usr/lib/libkmailprivate.so.4
#11 0xb75b5e1f in KMCommand::qt_metacall () from /usr/lib/libkmailprivate.so.4
#12 0xb75c845a in KMMoveCommand::qt_metacall () from /usr/lib/libkmailprivate.so.4
#13 0xb75c8522 in KMDeleteMsgCommand::qt_metacall () from /usr/lib/libkmailprivate.so.4
#14 0xb6a0a831 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#15 0xb6a0b4a2 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#16 0xb75a7af3 in KMCommand::messagesTransfered () from /usr/lib/libkmailprivate.so.4
#17 0xb75c59f6 in KMCommand::transferSelectedMsgs () from /usr/lib/libkmailprivate.so.4
#18 0xb75c5c42 in KMCommand::slotStart () from /usr/lib/libkmailprivate.so.4
#19 0xb75b5dfb in KMCommand::qt_metacall () from /usr/lib/libkmailprivate.so.4
#20 0xb75c845a in KMMoveCommand::qt_metacall () from /usr/lib/libkmailprivate.so.4
#21 0xb75c8522 in KMDeleteMsgCommand::qt_metacall () from /usr/lib/libkmailprivate.so.4
#22 0xb6a0a831 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#23 0xb6a0b4a2 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#24 0xb6a0f967 in ?? () from /usr/lib/libQtCore.so.4
#25 0xb6a0fa7c in ?? () from /usr/lib/libQtCore.so.4
#26 0xb6a0479f in QObject::event () from /usr/lib/libQtCore.so.4
#27 0xb5e7a6ac in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#28 0xb5e81e44 in QApplication::notify () from /usr/lib/libQtGui.so.4
#29 0xb7e45bfa in KApplication::notify () from /usr/lib/libkdeui.so.5
#30 0xb69f474b in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#31 0xb6a22a26 in ?? () from /usr/lib/libQtCore.so.4
#32 0xb6a1fad0 in ?? () from /usr/lib/libQtCore.so.4
#33 0xb41bee08 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#34 0xb41c2370 in g_main_context_iterate () from /usr/lib/libglib-2.0.so.0
#35 0xb41c24a3 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#36 0xb6a1fa1c in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#37 0xb5f195c5 in ?? () from /usr/lib/libQtGui.so.4
#38 0xb69f2cd9 in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#39 0xb69f3122 in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#40 0xb69f549f in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#41 0xb5e7a527 in QApplication::exec () from /usr/lib/libQtGui.so.4
#42 0x0804a7e2 in _start ()

This bug may be a duplicate of or related to bug 192306