Version:            (using KDE 4.1.3)
OS:                Linux
Installed from:    Ubuntu Packages

When I run Xrandr (xrandr --output VGA-0 --auto --above LVDS) Kwin crashes. Here is the report:

Application: KWin (kwin), signal SIGABRT
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[Thread debugging using libthread_db enabled]
[New Thread 0xb65736c0 (LWP 6247)]
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[KCrash handler]
#6  0xb804f430 in __kernel_vsyscall ()
#7  0xb7e30880 in raise () from /lib/tls/i686/cmov/libc.so.6
#8  0xb7e32248 in abort () from /lib/tls/i686/cmov/libc.so.6
#9  0xb79d4795 in qt_message_output () from /usr/lib/libQtCore.so.4
#10 0xb79d4872 in qFatal () from /usr/lib/libQtCore.so.4
#11 0xb79d48cc in qt_assert_x () from /usr/lib/libQtCore.so.4
#12 0xb7fcd6c2 in ?? () from /usr/lib/libkdeinit4_kwin.so
#13 0xb7fcd9a6 in ?? () from /usr/lib/libkdeinit4_kwin.so
#14 0xb7fcddfb in ?? () from /usr/lib/libkdeinit4_kwin.so
#15 0xb7fce071 in ?? () from /usr/lib/libkdeinit4_kwin.so
#16 0xb7fd6dbb in ?? () from /usr/lib/libkdeinit4_kwin.so
#17 0xb7fd8269 in ?? () from /usr/lib/libkdeinit4_kwin.so
#18 0xb7fd82d4 in ?? () from /usr/lib/libkdeinit4_kwin.so
#19 0xb7f804f0 in ?? () from /usr/lib/libkdeinit4_kwin.so
#20 0xb7ae1a60 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#21 0xb7ae27e2 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#22 0xb76879e3 in QDesktopWidget::resized () from /usr/lib/libQtGui.so.4
#23 0xb710e86f in QApplication::x11ProcessEvent () from /usr/lib/libQtGui.so.4
#24 0xb71387aa in ?? () from /usr/lib/libQtGui.so.4
#25 0xb68516f8 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#26 0xb6854da3 in ?? () from /usr/lib/libglib-2.0.so.0
#27 0xb6854f61 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#28 0xb7af7478 in QEventDispatcherGlib::processEvents ()
   from /usr/lib/libQtCore.so.4
#29 0xb7137ea5 in ?? () from /usr/lib/libQtGui.so.4
#30 0xb7acb52a in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#31 0xb7acb6ea in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#32 0xb7acdda5 in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#33 0xb709d767 in QApplication::exec () from /usr/lib/libQtGui.so.4
#34 0xb7f9b8ee in kdemain () from /usr/lib/libkdeinit4_kwin.so
#35 0x080485a2 in _start ()
#0  0xb804f430 in __kernel_vsyscall ()