Version:           4.4 rc1 (using Devel)
OS:                Linux
Installed from:    Compiled sources

Application: kontact (4.4 rc1)
KDE Platform Version: 4.3.90 (KDE 4.3.90 (KDE 4.4 RC1)) "release 212"
Qt Version: 4.6.0
Operating System: Linux 2.6.31.8-0.1-default x86_64
Distribution: "openSUSE 11.2 (x86_64)"

-- Information about the crash:
Kmail hangs when opening certain mails (in this example a GMX spam report mail).

The crash can be reproduced every time.

This is the backtrace on killing kmail with kmail-debug installed:

Application: KMail (kmail), signal: Aborted
[KCrash Handler]
#5  0x00007fef644f64e5 in raise () from /lib64/libc.so.6
#6  0x00007fef644f79b0 in abort () from /lib64/libc.so.6
#7  0x00007fef65a427e4 in qt_message_output(QtMsgType, char const*) () from /usr/lib64/libQtCore.so.4
#8  0x00007fef65a429c2 in ?? () from /usr/lib64/libQtCore.so.4
#9  0x00007fef65a42b75 in qFatal(char const*, ...) () from /usr/lib64/libQtCore.so.4
#10 0x00007fef673be5fc in KMainWindow::memberList() () from /usr/lib64/libkdeui.so.5
#11 0x00007fef664d252b in KMKernel::dumpDeadLetters (this=<value optimized out>) at /usr/src/debug/kdepim-4.3.90/kmail/kmkernel.cpp:1907
#12 0x00007fef67382a32 in KCrash::defaultCrashHandler(int) () from /usr/lib64/libkdeui.so.5
#13 <signal handler called>
#14 0x0000000000000000 in ?? ()
#15 0x00007fef61957ca3 in ?? () from /usr/lib64/libkio.so.5
#16 0x00007fef6180bfb3 in ?? () from /usr/lib64/libkio.so.5
#17 0x00007fef644f9065 in ?? () from /lib64/libc.so.6
#18 0x00007fef644f90b5 in exit () from /lib64/libc.so.6
#19 0x00007fef665953fa in kmsignalHandler (sigId=15) at /usr/src/debug/kdepim-4.3.90/kmail/kmstartup.cpp:59
#20 <signal handler called>
#21 0x00007fef6458c033 in poll () from /lib64/libc.so.6
#22 0x00007fef5c05958c in ?? () from /usr/lib64/libglib-2.0.so.0
#23 0x00007fef5c0598d0 in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#24 0x00007fef65b66b13 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#25 0x00007fef64fae94e in ?? () from /usr/lib64/libQtGui.so.4
#26 0x00007fef65b3be52 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#27 0x00007fef65b3c22c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#28 0x00007fef66e341d6 in KJob::exec() () from /usr/lib64/libkdecore.so.5
#29 0x00007fef66532d0e in KMail::FancyHeaderStyle::format (this=<value optimized out>, message=<value optimized out>, strategy=<value optimized out>, vCardName=<value optimized out>, 
    printing=<value optimized out>, topLevel=true) at /usr/src/debug/kdepim-4.3.90/kmail/headerstyle.cpp:490
#30 0x00007fef663c7d9b in KMReaderWin::writeMsgHeader (this=0xe74770, aMsg=<value optimized out>, vCardNode=0x0, topLevel=true) at /usr/src/debug/kdepim-4.3.90/kmail/kmreaderwin.cpp:1725
#31 0x00007fef663dc24d in KMReaderWin::parseMsg (this=0xe74770, aMsg=0x2fccc70) at /usr/src/debug/kdepim-4.3.90/kmail/kmreaderwin.cpp:1606
#32 0x00007fef663d24f0 in KMReaderWin::displayMessage (this=0xe74770) at /usr/src/debug/kdepim-4.3.90/kmail/kmreaderwin.cpp:1535
#33 0x00007fef663d26c0 in KMReaderWin::updateReaderWin (this=0xe74770) at /usr/src/debug/kdepim-4.3.90/kmail/kmreaderwin.cpp:1478
#34 0x00007fef663df8dd in KMReaderWin::qt_metacall (this=0xe74770, _c=InvokeMetaMethod, _id=<value optimized out>, _a=0x7fff7854cac0) at /usr/src/debug/kdepim-4.3.90/build/kmail/kmreaderwin.moc:179
#35 0x00007fef65b502b3 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib64/libQtCore.so.4
#36 0x00007fef65b4cf23 in QObject::event(QEvent*) () from /usr/lib64/libQtCore.so.4
#37 0x00007fef64f01bcc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4
#38 0x00007fef64f081ed in QApplication::notify(QObject*, QEvent*) () from /usr/lib64/libQtGui.so.4
#39 0x00007fef673ce806 in KApplication::notify(QObject*, QEvent*) () from /usr/lib64/libkdeui.so.5
#40 0x00007fef65b3d53c in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib64/libQtCore.so.4
#41 0x00007fef65b6a2b5 in ?? () from /usr/lib64/libQtCore.so.4
#42 0x00007fef65b66e48 in ?? () from /usr/lib64/libQtCore.so.4
#43 0x00007fef5c055dde in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0
#44 0x00007fef5c0597a8 in ?? () from /usr/lib64/libglib-2.0.so.0
#45 0x00007fef5c0598d0 in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#46 0x00007fef65b66b13 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#47 0x00007fef64fae94e in ?? () from /usr/lib64/libQtGui.so.4
#48 0x00007fef65b3be52 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#49 0x00007fef65b3c22c in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQtCore.so.4
#50 0x00007fef65b3ff7b in QCoreApplication::exec() () from /usr/lib64/libQtCore.so.4
#51 0x0000000000403592 in main (argc=<value optimized out>, argv=<value optimized out>) at /usr/src/debug/kdepim-4.3.90/kmail/main.cpp:156