Exiting Kate displays crash message

[Tathosh]

In Kubuntu 9.04 64 bit I go to K menu -> Applications -> Utilities -> Kate. Then I go to File menu a choose Quit. A message about Fatal Error is displayed (but closing Kate by using "x" icon works correctly). The details of the message are:

This backtrace appears to be of no use.
This is probably because your packages are built in a way which prevents creation of proper backtraces, or the stack frame was seriously corrupted in the crash.

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[Thread debugging using libthread_db enabled]
[New Thread 0x7fa1f00f0750 (LWP 3530)]
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0x00007fa1ec3dacf0 in nanosleep () from /lib/libc.so.6
[Current thread is 0 (process 3530)]

Thread 1 (Thread 0x7fa1f00f0750 (LWP 3530)):
#0 0x00007fa1ec3dacf0 in nanosleep () from /lib/libc.so.6
#1 0x00007fa1ec3dab47 in sleep () from /lib/libc.so.6
#2 0x00007fa1eefe7b1f in ?? () from /usr/lib/libkdeui.so.5
#3 0x00007fa1eefe842a in KCrash::defaultCrashHandler () from /usr/lib/libkdeui.so.5
#4 <signal handler called>
#5 0x00007fa1edf756ae in QMenu::findIdForAction () from /usr/lib/libQtGui.so.4
#6 0x00007fa1edf76bbb in ?? () from /usr/lib/libQtGui.so.4
#7 0x00007fa1edf7ccee in ?? () from /usr/lib/libQtGui.so.4
#8 0x00007fa1ef053b71 in KMenu::mouseReleaseEvent () from /usr/lib/libkdeui.so.5
#9 0x00007fa1edb9e97f in QWidget::event () from /usr/lib/libQtGui.so.4
#10 0x00007fa1edf7f4ab in QMenu::event () from /usr/lib/libQtGui.so.4
#11 0x00007fa1edb4d83d in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#12 0x00007fa1edb5618a in QApplication::notify () from /usr/lib/libQtGui.so.4
#13 0x00007fa1eef8226b in KApplication::notify () from /usr/lib/libkdeui.so.5
#14 0x00007fa1ecfa475c in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#15 0x00007fa1edb553d8 in QApplicationPrivate::sendMouseEvent () from /usr/lib/libQtGui.so.4
#16 0x00007fa1edbbf084 in ?? () from /usr/lib/libQtGui.so.4
#17 0x00007fa1edbbdb38 in QApplication::x11ProcessEvent () from /usr/lib/libQtGui.so.4
#18 0x00007fa1edbe6514 in ?? () from /usr/lib/libQtGui.so.4
#19 0x00007fa1e83ec20a in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#20 0x00007fa1e83ef8e0 in ?? () from /usr/lib/libglib-2.0.so.0
#21 0x00007fa1e83efa7c in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#22 0x00007fa1ecfcde6f in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#23 0x00007fa1edbe5c9f in ?? () from /usr/lib/libQtGui.so.4
#24 0x00007fa1ecfa3002 in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#25 0x00007fa1ecfa33cd in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#26 0x00007fa1ecfa5694 in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#27 0x00007fa1efd03c35 in kdemain () from /usr/lib/libkdeinit4_kate.so
#28 0x00007fa1ec3515a6 in __libc_start_main () from /lib/libc.so.6
#29 0x0000000000400729 in _start ()
#0 0x00007fa1ec3dacf0 in nanosleep () from /lib/libc.so.6