Application that crashed: kwin
Version of the application: 4.3.2 (KDE 4.3.2)
KDE Version: 4.3.2 (KDE 4.3.2)
Qt Version: 4.5.2
Operating System: Linux 2.6.31-22-generic x86_64
Distribution: Ubuntu 9.10

What I was doing when the application crashed:
It was arbitrary. I was reading on the screen, and when I just moved the mouse the plasma crash.

 -- Backtrace:
Application: KWin (kwin), signal: Segmentation fault
The current source language is "auto; currently c".
[KCrash Handler]
#5  KWin::WindowMotionManager::manage (this=<value optimized out>, w=0xcb00000c7c) at ../../../kwin/lib/kwineffects.cpp:1148
#6  0x00007fac0ed397d3 in KWin::PresentWindowsEffect::setActive (this=0x1c36450, active=<value optimized out>, closingTab=<value optimized out>)
    at ../../../kwin/effects/presentwindows/presentwindows.cpp:1234
#7  0x00007fac0ed3aa09 in KWin::PresentWindowsEffect::toggleActive (this=0x1c36450, border=KWin::ElectricTopLeft) at ../../../kwin/effects/presentwindows/presentwindows.h:95
#8  KWin::PresentWindowsEffect::borderActivated (this=0x1c36450, border=KWin::ElectricTopLeft) at ../../../kwin/effects/presentwindows/presentwindows.cpp:370
#9  0x00007fac2137dd46 in KWin::EffectsHandlerImpl::borderActivated (this=<value optimized out>, border=KWin::ElectricTopLeft) at ../../kwin/effects.cpp:313
#10 0x00007fac21302909 in KWin::Workspace::checkElectricBorder (this=0x1a94d10, pos=..., now=<value optimized out>) at ../../kwin/workspace.cpp:2180
#11 0x00007fac21302d9c in KWin::Workspace::electricBorderEvent (this=0xcb00000c7c, e=<value optimized out>) at ../../kwin/workspace.cpp:2248
#12 0x00007fac2132a882 in KWin::Workspace::workspaceEvent (this=0x1a94d10, e=0x7fffa63878e0) at ../../kwin/events.cpp:475
#13 0x00007fac21313ab8 in KWin::Application::x11EventFilter (this=0x7fffa6387cd0, e=0x7fffa63878e0) at ../../kwin/main.cpp:357
#14 0x00007fac1daf8391 in qt_x11EventFilter (ev=0x7fffa63878e0) at kernel/qapplication_x11.cpp:375
#15 0x00007fac1db08a24 in QApplication::x11ProcessEvent (this=<value optimized out>, event=0x7fffa63878e0) at kernel/qapplication_x11.cpp:3271
#16 0x00007fac1db32d0c in x11EventSourceDispatch (s=<value optimized out>, callback=<value optimized out>, user_data=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:146
#17 0x00007fac16e58bce in g_main_context_dispatch () from /lib/libglib-2.0.so.0
#18 0x00007fac16e5c598 in ?? () from /lib/libglib-2.0.so.0
#19 0x00007fac16e5c6c0 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#20 0x00007fac1d3c21a6 in QEventDispatcherGlib::processEvents (this=0x184ce90, flags=<value optimized out>) at kernel/qeventdispatcher_glib.cpp:327
#21 0x00007fac1db324be in QGuiEventDispatcherGlib::processEvents (this=0xcb00000c7c, flags=<value optimized out>) at kernel/qguieventdispatcher_glib.cpp:202
#22 0x00007fac1d398532 in QEventLoop::processEvents (this=<value optimized out>, flags=) at kernel/qeventloop.cpp:149
#23 0x00007fac1d398904 in QEventLoop::exec (this=0x7fffa6387c10, flags=) at kernel/qeventloop.cpp:201
#24 0x00007fac1d39aab9 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
#25 0x00007fac21316094 in kdemain (argc=<value optimized out>, argv=<value optimized out>) at ../../kwin/main.cpp:522
#26 0x00007fac20f7fabd in __libc_start_main (main=<value optimized out>, argc=<value optimized out>, ubp_av=<value optimized out>, init=<value optimized out>, fini=<value optimized out>, 
    rtld_fini=<value optimized out>, stack_end=0x7fffa63881b8) at libc-start.c:220
#27 0x0000000000400679 in _start () at ../sysdeps/x86_64/elf/start.S:113

Reported using DrKonqi