Version:            (using KDE KDE 3.5.5)
Installed from:    Ubuntu Packages
OS:                Linux

Kicker crashed when I wanted to turn off my system. By this, it efficiently hindered the computer from being turned off, I didn't notice it instantly so the computer still ran a few hours later without any reason. however here is the backtrace I saved:

Using host libthread_db library "/lib/tls/i686/cmov/libthread_db.so.1".
[Thread debugging using libthread_db enabled]
[New Thread -1231959744 (LWP 4647)]
[KCrash handler]
#6  0xb6207377 in TaskContainer::popupMenu (this=0x8345088, action=0)
    at /build/buildd/kdebase-3.5.5/./kicker/taskbar/taskcontainer.cpp:1160
#7  0xb620cb40 in TaskContainer::performAction (this=0x8345088, action=0)
    at /build/buildd/kdebase-3.5.5/./kicker/taskbar/taskcontainer.cpp:979
#8  0xb621288c in TaskContainer::mousePressEvent (this=0x8345088, 
    e=0xbfc47380)
    at /build/buildd/kdebase-3.5.5/./kicker/taskbar/taskcontainer.cpp:913
#9  0xb72e06ec in QWidget::event () from /usr/lib/libqt-mt.so.3
#10 0xb7240b88 in QApplication::internalNotify () from /usr/lib/libqt-mt.so.3
#11 0xb7242d46 in QApplication::notify () from /usr/lib/libqt-mt.so.3
#12 0xb7936db2 in KApplication::notify (this=0x8113b60, receiver=0x8345088, 
    event=0xbfc47380)
    at /build/buildd/kdelibs-3.5.5/./kdecore/kapplication.cpp:550
#13 0xb71d33fd in QApplication::sendSpontaneousEvent ()
   from /usr/lib/libqt-mt.so.3
#14 0xb71d2062 in QETWidget::translateMouseEvent ()
   from /usr/lib/libqt-mt.so.3
#15 0xb71d014c in QApplication::x11ProcessEvent () from /usr/lib/libqt-mt.so.3
#16 0xb71e7320 in QEventLoop::processEvents () from /usr/lib/libqt-mt.so.3
#17 0xb725b25e in QEventLoop::enterLoop () from /usr/lib/libqt-mt.so.3
#18 0xb725b06e in QEventLoop::exec () from /usr/lib/libqt-mt.so.3
#19 0xb7242731 in QApplication::exec () from /usr/lib/libqt-mt.so.3
#20 0xb674c632 in kdemain (argc=1, argv=0x8117db8)
    at /build/buildd/kdebase-3.5.5/./kicker/kicker/core/main.cpp:149
#21 0xb7f89524 in kdeinitmain (argc=1, argv=0x8117db8) at kicker_dummy.cpp:3
#22 0x0804e4df in launch (argc=1, _name=0x8117cb4 "kicker", 
    args=0x8117cbb "", cwd=0x0, envc=0, envs=0x8117cbf "", reset_env=false, 
    tty=0x0, avoid_loops=false, startup_id_str=0x8050e2e "0")
    at /build/buildd/kdelibs-3.5.5/./kinit/kinit.cpp:673
#23 0x0804ed6a in handle_launcher_request (sock=10)
    at /build/buildd/kdelibs-3.5.5/./kinit/kinit.cpp:1240
#24 0x0804f118 in handle_requests (waitForPid=0)
    at /build/buildd/kdelibs-3.5.5/./kinit/kinit.cpp:1443
#25 0x080503ac in main (argc=5, argv=0xbfc480a4, envp=0xbfc480bc)
    at /build/buildd/kdelibs-3.5.5/./kinit/kinit.cpp:1909
#26 0xb7d128cc in __libc_start_main () from /lib/tls/i686/cmov/libc.so.6
#27 0x0804b971 in _start ()