Application: kmail (4.8.0)
KDE Platform Version: 4.8.1 (4.8.1) "release 481"
Qt Version: 4.8.0
Operating System: Linux 3.1.9-1.4-desktop x86_64
Distribution: "openSUSE 12.1 (x86_64)"

-- Information about the crash:
started kmail --> click on mail in Inbox --> crash
Does not always happen, but it crashes very often (sometimes when I open the third or fourth email)
Producable after every restart of kmail, KDE and the whole computer as well.

Happens the same when I use kmail within the Kontact shell.

The crash can be reproduced some of the time.

-- Backtrace:
Application: KMail (kmail), signal: Aborted
[Current thread is 1 (Thread 0x7fba69077780 (LWP 3544))]

Thread 4 (Thread 0x7fba48fc5700 (LWP 3556)):
#0  0x00007fba641b2e6c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007fba5a86ac12 in ?? () from /usr/lib64/libQtWebKit.so.4
#2  0x00007fba5a86ac49 in ?? () from /usr/lib64/libQtWebKit.so.4
#3  0x00007fba641aef05 in start_thread () from /lib64/libpthread.so.0
#4  0x00007fba663a710d in clone () from /lib64/libc.so.6

Thread 3 (Thread 0x7fba487c4700 (LWP 3557)):
#0  0x00007fba6639dff3 in poll () from /lib64/libc.so.6
#1  0x00007fba5e584a98 in ?? () from /usr/lib64/libglib-2.0.so.0
#2  0x00007fba5e584f59 in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#3  0x00007fba67a03956 in QEventDispatcherGlib::processEvents (this=0x7fba400008c0, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:426
#4  0x00007fba679d3682 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007fba679d38d7 in QEventLoop::exec (this=0x7fba487c3e00, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007fba678d4537 in QThread::exec (this=<optimized out>) at thread/qthread.cpp:501
#7  0x00007fba678d755b in QThreadPrivate::start (arg=0x13740a0) at thread/qthread_unix.cpp:298
#8  0x00007fba641aef05 in start_thread () from /lib64/libpthread.so.0
#9  0x00007fba663a710d in clone () from /lib64/libc.so.6

Thread 2 (Thread 0x7fba464d9700 (LWP 3566)):
[KCrash Handler]
#6  0x00007fba66300d95 in raise () from /lib64/libc.so.6
#7  0x00007fba663022ab in abort () from /lib64/libc.so.6
#8  0x00007fba5cd9b655 in _dbus_abort () at dbus-sysdeps.c:94
#9  0x00007fba5cd925f1 in _dbus_warn_check_failed (format=0x7fba5cda1920 "arguments to %s() were incorrect, assertion \"%s\" failed in file %s line %d.\nThis is normally a bug in some application using the D-Bus library.\n") at dbus-internals.c:289
#10 0x00007fba6442410f in q_dbus_pending_call_unref (pending=<optimized out>) at qdbus_symbols_p.h:321
#11 QDBusPendingCallPrivate::~QDBusPendingCallPrivate (this=0x7fb9f4012f20, __in_chrg=<optimized out>) at qdbuspendingcall.cpp:137
#12 0x00007fba644242c3 in ~QExplicitlySharedDataPointer (this=<optimized out>, __in_chrg=<optimized out>) at ../../src/corelib/tools/qshareddata.h:166
#13 ~QDBusPendingCall (this=<optimized out>, __in_chrg=<optimized out>) at qdbuspendingcall.cpp:271
#14 QDBusPendingCall::~QDBusPendingCall (this=<optimized out>, __in_chrg=<optimized out>) at qdbuspendingcall.cpp:271
#15 0x00007fba5f193ebd in ~QDBusPendingReply (this=0x7fba464d8850, __in_chrg=<optimized out>) at /usr/include/QtDBus/qdbuspendingreply.h:115
#16 Nepomuk::ResourceWatcher::addResource (this=<optimized out>, res=<optimized out>) at /usr/src/debug/kdelibs-4.8.1/nepomuk/core/resourcewatcher.cpp:143
#17 0x00007fba5f175dcb in Nepomuk::ResourceData::load (this=0x7fb9f4008b60) at /usr/src/debug/kdelibs-4.8.1/nepomuk/core/resourcedata.cpp:405
#18 0x00007fba5f1767bc in Nepomuk::ResourceData::property (this=0x7fb9f4008b60, uri=...) at /usr/src/debug/kdelibs-4.8.1/nepomuk/core/resourcedata.cpp:265
#19 0x00007fba5f18c7e3 in Nepomuk::Resource::property (this=0x7fba464d8d00, uri=...) at /usr/src/debug/kdelibs-4.8.1/nepomuk/core/resource.cpp:301
#20 0x00007fba624f30ca in MessageCore::NepomukResourceRetrieverRunnable::run (this=0x21d72a0) at /usr/src/debug/kdepim-4.8.1/messagecore/asyncnepomukresourceretriever.cpp:47
#21 0x00007fba678cad12 in QThreadPoolThread::run (this=0x1a124d0) at concurrent/qthreadpool.cpp:107
#22 0x00007fba678d755b in QThreadPrivate::start (arg=0x1a124d0) at thread/qthread_unix.cpp:298
#23 0x00007fba641aef05 in start_thread () from /lib64/libpthread.so.0
#24 0x00007fba663a710d in clone () from /lib64/libc.so.6

Thread 1 (Thread 0x7fba69077780 (LWP 3544)):
#0  0x00007fba641b2e6c in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007fba678d7a6b in wait (time=18446744073709551615, this=0x1a09de0) at thread/qwaitcondition_unix.cpp:86
#2  QWaitCondition::wait (this=<optimized out>, mutex=0x1a08da8, time=18446744073709551615) at thread/qwaitcondition_unix.cpp:158
#3  0x00007fba678ca49e in QThreadPoolPrivate::waitForDone (this=0x1a08d20, msecs=-1) at concurrent/qthreadpool.cpp:298
#4  0x00007fba678cbec4 in QThreadPool::~QThreadPool (this=<optimized out>, __in_chrg=<optimized out>) at concurrent/qthreadpool.cpp:440
#5  0x00007fba624f1a94 in ~AsyncNepomukResourceRetrieverPrivate (this=0x1988790, __in_chrg=<optimized out>) at /usr/src/debug/kdepim-4.8.1/messagecore/asyncnepomukresourceretriever.cpp:58
#6  MessageCore::AsyncNepomukResourceRetriever::~AsyncNepomukResourceRetriever (this=0x1a12470, __in_chrg=<optimized out>) at /usr/src/debug/kdepim-4.8.1/messagecore/asyncnepomukresourceretriever.cpp:113
#7  0x00007fba61f55b49 in ~CallbackNepomukResourceRetriever (this=0x1a12470, __in_chrg=<optimized out>) at /usr/src/debug/kdepim-4.8.1/messagelist/core/callbacknepomukresourceretriever.h:32
#8  MessageList::CallbackNepomukResourceRetriever::~CallbackNepomukResourceRetriever (this=0x1a12470, __in_chrg=<optimized out>) at /usr/src/debug/kdepim-4.8.1/messagelist/core/callbacknepomukresourceretriever.h:32
#9  0x00007fba663039a1 in __run_exit_handlers () from /lib64/libc.so.6
#10 0x00007fba66303a25 in exit () from /lib64/libc.so.6
#11 0x00007fba66dc5ae8 in qt_xio_errhandler () at kernel/qapplication_x11.cpp:770
#12 0x00007fba68a81918 in KApplication::xioErrhandler (this=0x7fffcd338440, dpy=0x66fe60) at /usr/src/debug/kdelibs-4.8.1/kdeui/kernel/kapplication.cpp:419
#13 0x00007fba65bb051e in _XIOError () from /usr/lib64/libX11.so.6
#14 0x00007fba65bade2d in _XEventsQueued () from /usr/lib64/libX11.so.6
#15 0x00007fba65b9e81f in XEventsQueued () from /usr/lib64/libX11.so.6
#16 0x00007fba66dfd11c in x11EventSourceCheck (s=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:85
#17 0x00007fba5e584264 in g_main_context_check () from /usr/lib64/libglib-2.0.so.0
#18 0x00007fba5e584ab2 in ?? () from /usr/lib64/libglib-2.0.so.0
#19 0x00007fba5e584f59 in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#20 0x00007fba67a038ef in QEventDispatcherGlib::processEvents (this=0x60b000, flags=<optimized out>) at kernel/qeventdispatcher_glib.cpp:424
#21 0x00007fba66dfd2de in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=<optimized out>) at kernel/qguieventdispatcher_glib.cpp:204
#22 0x00007fba679d3682 in QEventLoop::processEvents (this=<optimized out>, flags=...) at kernel/qeventloop.cpp:149
#23 0x00007fba679d38d7 in QEventLoop::exec (this=0x7fffcd338320, flags=...) at kernel/qeventloop.cpp:204
#24 0x00007fba679d8435 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1148
#25 0x0000000000402df3 in ?? ()
#26 0x00007fba662ed23d in __libc_start_main () from /lib64/libc.so.6
#27 0x00000000004032d5 in _start ()

Reported using DrKonqi