Application that crashed: kxkb
Version of the application: 2.0
KDE Version: 4.3.2 (KDE 4.3.2)
Qt Version: 4.5.2
Operating System: Linux 2.6.31-20-generic x86_64
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
I was not using the computer when it crashed.
The system is Ubuntu 9.10 which was upgraded from Ubuntu 9.04

Keyboard switcher worked fine in Ubuntu 9.04

 -- Backtrace:
Application: KDE Keyboard Layout Switcher (kdeinit4), signal: Segmentation fault
[KCrash Handler]
#5  0x00007fa799bbdac1 in ?? () from /usr/lib/libkdeinit4_kxkb.so
#6  0x00007fa799bb7aef in ?? () from /usr/lib/libkdeinit4_kxkb.so
#7  0x00007fa799bb9cf4 in ?? () from /usr/lib/libkdeinit4_kxkb.so
#8  0x00007fa799bba47f in ?? () from /usr/lib/libkdeinit4_kxkb.so
#9  0x00007fa7a36cdf56 in KApplication::x11EventFilter(_XEvent*) () from /usr/lib/libkdeui.so.5
#10 0x00007fa7a2af2391 in ?? () from /usr/lib/libQtGui.so.4
#11 0x00007fa7a2b02a24 in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib/libQtGui.so.4
#12 0x00007fa7a2b2cd0c in ?? () from /usr/lib/libQtGui.so.4
#13 0x00007fa7a19c8bce in g_main_dispatch (context=0xc55df0) at /build/buildd/glib2.0-2.22.3/glib/gmain.c:1960
#14 IA__g_main_context_dispatch (context=0xc55df0) at /build/buildd/glib2.0-2.22.3/glib/gmain.c:2513
#15 0x00007fa7a19cc598 in g_main_context_iterate (context=0xc55df0, block=<value optimized out>, dispatch=<value optimized out>, self=<value optimized out>)
    at /build/buildd/glib2.0-2.22.3/glib/gmain.c:2591
#16 0x00007fa7a19cc6c0 in IA__g_main_context_iteration (context=0xc55df0, may_block=1) at /build/buildd/glib2.0-2.22.3/glib/gmain.c:2654
#17 0x00007fa7a4b101a6 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#18 0x00007fa7a2b2c4be in ?? () from /usr/lib/libQtGui.so.4
#19 0x00007fa7a4ae6532 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#20 0x00007fa7a4ae6904 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/libQtCore.so.4
#21 0x00007fa7a4ae8ab9 in QCoreApplication::exec() () from /usr/lib/libQtCore.so.4
#22 0x00007fa799bbc255 in kdemain () from /usr/lib/libkdeinit4_kxkb.so
#23 0x0000000000406da8 in _start ()

Reported using DrKonqi