Version:            (using KDE KDE 3.5.1)
Installed from:    Debian stable Packages

Konqueror seems to have a problem disconnecting the kpart within Kaffeine or Kmplayer using Kubuntu (and fedora, Mandriva) packages.  I go to any webpage that plays a video, of any kind, and Kaffeine plays the video fine.  Upon leaving the page, or just closing Konqueror, a crash occurs.  The backtrace of interest is as follows:
[KCrash handler]
#6  0xb68f7e84 in pthread_mutex_lock ()
   from /lib/tls/i686/cmov/libpthread.so.0
#7  0xb7d5d6fe in pthread_mutex_lock () from /lib/tls/i686/cmov/libc.so.6
#8  0xb6e93a3c in XUnlockDisplay () from /usr/lib/libX11.so.6
#9  0xb6eb11ed in XrmDestroyDatabase () from /usr/lib/libX11.so.6
#10 0xb6e95b14 in _XFreeDisplayStructure () from /usr/lib/libX11.so.6
#11 0xb6e82427 in XCloseDisplay () from /usr/lib/libX11.so.6
#12 0xb717108a in qt_cleanup () from /usr/lib/libqt-mt.so.3
#13 0xb71f3fc6 in QApplication::~QApplication () from /usr/lib/libqt-mt.so.3
#14 0xb7883428 in KApplication::~KApplication () from /usr/lib/libkdecore.so.4
#15 0xb677490b in kdemain () from /usr/lib/libkdeinit_konqueror.so
#16 0xb67bb4f4 in kdeinitmain () from /usr/lib/kde3/konqueror.so
#17 0x0804e00f in ?? ()
#18 0x00000002 in ?? ()
#19 0x08134fd8 in ?? ()
#20 0x00000001 in ?? ()
#21 0x00000000 in ?? ()

To me, it looks as though the qt_cleanup () function is not allowing a clean disconnect.  I'm not sure if there is a bug report for this specifically, but for me, this bug has occurred with fedora core 4 rpms, Mandriva 2006 rpms and now Kubuntu dapper flight 4-5 debs.  Versions of Kaffeine have been 7.0, 7.1, and now 8.0.  The last 6 months of kmplayer releases have given me the same crash.  I see there are some bugs listed as resolved for similar crashes, but I've been experiencing this still.  Thanks again to all who responded to other bugs I've reported on, and thanks to those who look into this and all the bugs that are showing up.