Version:            (using KDE 4.0.83)
Installed from:    Ubuntu Packages

Ok. I can not close my KDE session because every time that i go to try to get out of KDE (through the K Menu through the Logout or Reboot or Shutdown button), all applications start to close, but... Kwin crashed and KDE never closes.
This happen always. But this is the first time that I report the bug.


This is the backtrace:

Application: KWin (kwin), signal SIGSEGV
[Thread debugging using libthread_db enabled]
[New Thread 0x7f682a2177e0 (LWP 9638)]
[KCrash handler]
#5  0x00007f6827c60eea in ?? () from /usr/lib/libQtGui.so.4
#6  0x00007f6827c61290 in ?? () from /usr/lib/libQtGui.so.4
#7  0x00007f6827c57f6d in QPixmap::deref () from /usr/lib/libQtGui.so.4
#8  0x00007f6827c585b4 in QPixmap::~QPixmap () from /usr/lib/libQtGui.so.4
#9  0x00007f681f0953bf in QCache<unsigned long long, QPixmap>::clear (
    this=0x65dfa8) at /usr/include/qt4/QtCore/qcache.h:140
#10 0x00007f681f0953fd in ~QCache (this=0x86dc00)
    at /usr/include/qt4/QtCore/qcache.h:104
#11 0x00007f681f095427 in ~OxygenHelper (this=0x65df50)
    at /build/buildd/kdebase-workspace-4.0.83/kwin/clients/ozone/lib/helper.h:39
#12 0x00007f6829b57110 in exit () from /lib/libc.so.6
#13 0x00007f6828a57c74 in _IceDefaultIOErrorHandler ()
   from /usr/lib/libICE.so.6
#14 0x00007f6828a5e864 in IceFlush () from /usr/lib/libICE.so.6
#15 0x00007f6828c6e9e9 in SmcCloseConnection () from /usr/lib/libSM.so.6
#16 0x00007f6827bfcf04 in QSessionManager::~QSessionManager ()
   from /usr/lib/libQtGui.so.4
#17 0x00007f6827babe51 in QApplication::~QApplication ()
   from /usr/lib/libQtGui.so.4
#18 0x00007f6829ec3001 in kdemain (argc=3, argv=0x7fff3235dc58)
    at /build/buildd/kdebase-workspace-4.0.83/kwin/main.cpp:511
#19 0x00007f6829b401c4 in __libc_start_main () from /lib/libc.so.6
#20 0x0000000000400649 in _start ()
#0  0x00007f6829bbfb81 in nanosleep () from /lib/libc.so.6