Comment 10 for bug 28771

No answer, so here's your back trace:

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Using host libthread_db library "/lib/tls/i686/cmov/libthread_db.so.1".
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[Thread debugging using libthread_db enabled]
[New Thread -1231673664 (LWP 19417)]
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[KCrash handler]
#6 0xb6991e84 in pthread_mutex_lock ()
   from /lib/tls/i686/cmov/libpthread.so.0
#7 0xb7dfd70e in pthread_mutex_lock () from /lib/tls/i686/cmov/libc.so.6
#8 0xb6f2ba3c in XUnlockDisplay () from /usr/lib/libX11.so.6
#9 0xb6f491ed in XrmDestroyDatabase () from /usr/lib/libX11.so.6
#10 0xb6f2db14 in _XFreeDisplayStructure () from /usr/lib/libX11.so.6
#11 0xb6f1a427 in XCloseDisplay () from /usr/lib/libX11.so.6
#12 0xb720a7e6 in qt_cleanup () from /usr/lib/libqt-mt.so.3
#13 0xb728d6d4 in QApplication::~QApplication () from /usr/lib/libqt-mt.so.3
#14 0xb7922858 in KApplication::~KApplication () from /usr/lib/libkdecore.so.4
#15 0xb677a99b in kdemain () from /usr/lib/libkdeinit_konqueror.so
#16 0xb7fb74f4 in kdeinitmain () from /usr/lib/kde3/konqueror.so
#17 0x0804e0a3 in ?? ()
#18 0x00000002 in ?? ()
#19 0x0819c240 in ?? ()
#20 0x00000001 in ?? ()
#21 0x00000000 in ?? ()