Version:            (using KDE 4.2.2)
OS:                Linux
Installed from:    Ubuntu Packages

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 0x7f301d7ca750 (LWP 4546)]
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0x00007f3019612cf0 in nanosleep () from /lib/libc.so.6
[Current thread is 0 (process 4546)]

Thread 1 (Thread 0x7f301d7ca750 (LWP 4546)):
#0  0x00007f3019612cf0 in nanosleep () from /lib/libc.so.6
#1  0x00007f3019612b47 in sleep () from /lib/libc.so.6
#2  0x00007f301d02ab1f in ?? () from /usr/lib/libkdeui.so.5
#3  0x00007f301d02b42a in KCrash::defaultCrashHandler () from /usr/lib/libkdeui.so.5
#4  <signal handler called>
#5  0x00007f301b9fc3ce in QMenu::findIdForAction () from /usr/lib/libQtGui.so.4
#6  0x00007f301b9fd8db in ?? () from /usr/lib/libQtGui.so.4
#7  0x00007f301ba03a0e in ?? () from /usr/lib/libQtGui.so.4
#8  0x00007f301d096b71 in KMenu::mouseReleaseEvent () from /usr/lib/libkdeui.so.5
#9  0x00007f301b6258cf in QWidget::event () from /usr/lib/libQtGui.so.4
#10 0x00007f301ba061cb in QMenu::event () from /usr/lib/libQtGui.so.4
#11 0x00007f301b5d478d in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#12 0x00007f301b5dd0da in QApplication::notify () from /usr/lib/libQtGui.so.4
#13 0x00007f301cfc526b in KApplication::notify () from /usr/lib/libkdeui.so.5
#14 0x00007f301c3ea75c in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#15 0x00007f301b5dc328 in QApplicationPrivate::sendMouseEvent () from /usr/lib/libQtGui.so.4
#16 0x00007f301b645fd4 in ?? () from /usr/lib/libQtGui.so.4
#17 0x00007f301b644a88 in QApplication::x11ProcessEvent () from /usr/lib/libQtGui.so.4
#18 0x00007f301b66d464 in ?? () from /usr/lib/libQtGui.so.4
#19 0x00007f3017f2320a in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#20 0x00007f3017f268e0 in ?? () from /usr/lib/libglib-2.0.so.0
#21 0x00007f3017f26a7c in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#22 0x00007f301c413e6f in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#23 0x00007f301b66cbef in ?? () from /usr/lib/libQtGui.so.4
#24 0x00007f301c3e9002 in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#25 0x00007f301c3e93cd in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#26 0x00007f301c3eb694 in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#27 0x00007f301d3da3b2 in kdemain () from /usr/lib/libkdeinit4_klipper.so
#28 0x00007f30195895a6 in __libc_start_main () from /lib/libc.so.6
#29 0x0000000000400749 in _start ()
#0  0x00007f3019612cf0 in nanosleep () from /lib/libc.so.6