Version:           3.5.4 (using KDE 3.5.4, Debian Package 4:3.5.4-3 (testing/unstable))
Compiler:          Target: i486-linux-gnu
OS:                Linux (i686) release 2.6.17-1-686

Konqueror with kaffeine plugin started crashes when I close Konqueror

The backtrace :

Using host libthread_db library "/lib/tls/i686/cmov/libthread_db.so.1".
[Thread debugging using libthread_db enabled]
[New Thread -1500497696 (LWP 8783)]
[KCrash handler]
#6  0xa693a044 in pthread_mutex_lock ()
   from /lib/tls/i686/cmov/libpthread.so.0
#7  0xa7da9ed6 in pthread_mutex_lock () from /lib/tls/i686/cmov/libc.so.6
#8  0xa6ee357f in XInitThreads () from /usr/lib/libX11.so.6
#9  0xa6efe5bf in XrmDestroyDatabase () from /usr/lib/libX11.so.6
#10 0xa6ee4e96 in _XFreeDisplayStructure () from /usr/lib/libX11.so.6
#11 0xa6ed0d84 in XCloseDisplay () from /usr/lib/libX11.so.6
#12 0xa71ab44f in qt_cleanup () from /usr/lib/libqt-mt.so.3
#13 0xa7224c6e in QApplication::~QApplication () from /usr/lib/libqt-mt.so.3
#14 0xa78a0f59 in ~KApplication (this=0xafc22f2c)
    at /home/sid-user/kdelibs/kdelibs-3.5.4/./kdecore/kapplication.cpp:1644
#15 0xa6676065 in kdemain () from /usr/lib/libkdeinit_konqueror.so
#16 0xa7f69524 in kdeinitmain () from /usr/lib/kde3/konqueror.so
#17 0x0804e9d7 in launch (argc=2, _name=0x80a261c "konqueror", 
    args=0x80a264d "", cwd=0x80a264e "/home/gml", envc=25, envs=0x80a29ac "", 
    reset_env=true, tty=0x0, avoid_loops=false, startup_id_str=0x80a29b1 "0")
    at /home/sid-user/kdelibs/kdelibs-3.5.4/./kinit/kinit.cpp:639
#18 0x0804f279 in handle_launcher_request (sock=4)
    at /home/sid-user/kdelibs/kdelibs-3.5.4/./kinit/kinit.cpp:1206
#19 0x0804f785 in handle_requests (waitForPid=0)
    at /home/sid-user/kdelibs/kdelibs-3.5.4/./kinit/kinit.cpp:1397
#20 0x08050019 in main (argc=3, argv=0xafc239d4, envp=0xafc239e4)
    at /home/sid-user/kdelibs/kdelibs-3.5.4/./kinit/kinit.cpp:1863
#21 0xa7ce6ea8 in __libc_start_main () from /lib/tls/i686/cmov/libc.so.6
#22 0x0804b8a1 in _start () at ../sysdeps/i386/elf/start.S:119