[Lucid] kontact / kmail hangs and then crashes

Binary package hint: kontact

Application: kontact (4.4.2)
KDE Platform Version: 4.4.2 (KDE 4.4.2)
Qt Version: 4.6.2
Operating System: Linux 2.6.32-22-generic x86_64
Distribution: Ubuntu 10.04 LTS

-- Information about the crash:
I was typing a message in kmail, then it hanged, using 100% CPU. After around 30 seconds I straced it:

stat("/etc/localtime", {st_mode=S_IFREG|0644, st_size=2679, ...}) = 0
stat("/etc/localtime", {st_mode=S_IFREG|0644, st_size=2679, ...}) = 0
stat("/etc/localtime", {st_mode=S_IFREG|0644, st_size=2679, ...}) = 0
in endless loop

Then I terminated the process and I got the kde crash:

 -- Backtrace:
Application: Kontact (kontact), signal: Aborted
[Current thread is 1 (Thread 0x7f325a662780 (LWP 21894))]

Thread 2 (Thread 0x7f3230e94710 (LWP 21909)):
#0 0x00007f3257743f53 in *__GI___poll (fds=<value optimized out>, nfds=<value optimized out>, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:87
#1 0x00007f32502784a9 in ?? () from /lib/libglib-2.0.so.0
#2 0x00007f32502788fc in g_main_context_iteration () from /lib/libglib-2.0.so.0
#3 0x00007f3258b2e566 in QEventDispatcherGlib::processEvents (this=0x1f04fb0, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:414
#4 0x00007f3258b03992 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#5 0x00007f3258b03d6c in QEventLoop::exec (this=0x7f3230e93d90, flags=) at kernel/qeventloop.cpp:201
#6 0x00007f3258a0dd59 in QThread::exec (this=<value optimized out>) at thread/qthread.cpp:487
#7 0x00007f3258ae4178 in QInotifyFileSystemWatcherEngine::run (this=0x1b52ba0) at io/qfilesystemwatcher_inotify.cpp:248
#8 0x00007f3258a10775 in QThreadPrivate::start (arg=0x1b52ba0) at thread/qthread_unix.cpp:248
#9 0x00007f32527ef9ca in start_thread (arg=<value optimized out>) at pthread_create.c:300
#10 0x00007f325775069d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#11 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f325a662780 (LWP 21894)):
[KCrash Handler]
#5 0x00007f325769da75 in *__GI_raise (sig=<value optimized out>) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
#6 0x00007f32576a15c0 in *__GI_abort () at abort.c:92
#7 0x00007f3258a08844 in qt_message_output (msgType=QtFatalMsg, buf=<value optimized out>) at global/qglobal.cpp:2250
#8 0x00007f3258a08a22 in qt_message (msgType=QtFatalMsg, msg=0x7f325964a4a8 "Fatal Error: Accessed global static '%s *%s()' after destruction. Defined at %s:%d", ap=0x7fff5d97fd10)
    at global/qglobal.cpp:2296
#9 0x00007f3258a08bd5 in qFatal (msg=0x5586 <Address 0x5586 out of bounds>) at global/qglobal.cpp:2479
#10 0x00007f32595c728f in KMainWindow::memberList() () from /usr/lib/libkdeui.so.5
#11 0x00007f32387475db in KMKernel::dumpDeadLetters() () from /usr/lib/libkmailprivate.so.4
#12 0x00007f3259561642 in KCrash::defaultCrashHandler(int) () from /usr/lib/libkdeui.so.5
#13 <signal handler called>
#14 0x00007f325769da75 in *__GI_raise (sig=<value optimized out>) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
#15 0x00007f32576a15c0 in *__GI_abort () at abort.c:92
#16 0x00007f32576d74fb in __libc_message (do_abort=<value optimized out>, fmt=<value optimized out>) at ../sysdeps/unix/sysv/linux/libc_fatal.c:189
#17 0x00007f32576e15b6 in malloc_printerr (action=3, str=0x7f32577b34b8 "munmap_chunk(): invalid pointer", ptr=<value optimized out>) at malloc.c:6264
#18 0x00007f32580c89db in QX11PaintEnginePrivate::~QX11PaintEnginePrivate() () from /usr/lib/libQtGui.so.4
#19 0x00007f3258004d01 in QScopedPointerDeleter<QPaintEnginePrivate>::cleanup (this=0x3043350, __in_chrg=<value optimized out>) at ../../include/QtCore/../../src/corelib/tools/qscopedpointer.h:62
#20 ~QScopedPointer (this=0x3043350, __in_chrg=<value optimized out>) at ../../include/QtCore/../../src/corelib/tools/qscopedpointer.h:100
#21 ~QPaintEngine (this=0x3043350, __in_chrg=<value optimized out>) at painting/qpaintengine.cpp:722
#22 0x00007f32580bdea0 in ~QX11PaintEngine (this=0x3043350, __in_chrg=<value optimized out>) at painting/qpaintengine_x11.cpp:469
#23 0x00007f3257fb3868 in QX11PixmapData::release (this=0x339a4f0) at image/qpixmap_x11.cpp:1243
#24 0x00007f3257fb409a in ~QX11PixmapData (this=0x339a4f0, __in_chrg=<value optimized out>) at image/qpixmap_x11.cpp:1238
#25 0x00007f3257fa1e69 in ~QExplicitlySharedDataPointer (this=0x2f17508, __in_chrg=<value optimized out>) at ../../include/QtCore/../../src/corelib/tools/qshareddata.h:159
#26 ~QPixmap (this=0x2f17508, __in_chrg=<value optimized out>) at image/qpixmap.cpp:323
#27 0x00007f323fa983b5 in ?? () from /usr/lib/kde4/plugins/styles/oxygen.so
#28 0x00007f323fa983fe in ?? () from /usr/lib/kde4/plugins/styles/oxygen.so
#29 0x00007f323faabdef in ?? () from /usr/lib/kde4/plugins/styles/oxygen.so
#30 0x00007f32576a3262 in __run_exit_handlers (status=1) at exit.c:78
#31 *__GI_exit (status=1) at exit.c:100
#32 0x00007f32479ac476 in ?? () from /usr/lib/libgdk-x11-2.0.so.0
#33 0x00007f32594ed288 in KApplication::xioErrhandler(_XDisplay*) () from /usr/lib/libkdeui.so.5
#34 0x00007f3251e767fe in _XIOError () from /usr/lib/libX11.so.6
#35 0x00007f3251e7e355 in ?? () from /usr/lib/libX11.so.6
#36 0x00007f3251e7ec07 in _XEventsQueued () from /usr/lib/libX11.so.6
#37 0x00007f3251e6740b in XEventsQueued () from /usr/lib/libX11.so.6
#38 0x00007f3257f6e697 in x11EventSourcePrepare (s=0xea1df0, timeout=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:79
#39 0x00007f3250277eb1 in g_main_context_prepare () from /lib/libglib-2.0.so.0
#40 0x00007f3250278318 in ?? () from /lib/libglib-2.0.so.0
#41 0x00007f32502788fc in g_main_context_iteration () from /lib/libglib-2.0.so.0
#42 0x00007f3258b2e513 in QEventDispatcherGlib::processEvents (this=0xe6fd70, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:412
#43 0x00007f3257f6e46e in QGuiEventDispatcherGlib::processEvents (this=0x5586, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#44 0x00007f3258b03992 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#45 0x00007f3258b03d6c in QEventLoop::exec (this=0x7fff5d981450, flags=) at kernel/qeventloop.cpp:201
#46 0x00007f3258b07aab in QCoreApplication::exec () at kernel/qcoreapplication.cpp:981
#47 0x0000000000403e8e in _start ()

Report to https://bugs.kde.org