Application that crashed: kde4-window-decorator
Version of the application: 0.0.1
KDE Version: 4.3.1 (KDE 4.3.1)
Qt Version: 4.5.2
Operating System: Linux 2.6.29.6-desktop-2mnb i686
Distribution: "Mandriva Linux 2009.1"

What I was doing when the application crashed:
I have east problem since I updated kde to version 4.3.1

 -- Backtrace:
Application: KDE Window Decorator (kde4-window-decorator), signal: Aborted
[KCrash Handler]
#6  0xffffe424 in __kernel_vsyscall ()
#7  0xb6bb0c00 in raise (sig=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
#8  0xb6bb2668 in abort () at abort.c:88
#9  0xb72e0d45 in qt_message_output (msgType=QtFatalMsg, 
    buf=0x8ab4908 "ASSERT: \"dynamic_cast< KDecorationBridgeUnstable* >( bridge )\" in file /tmp/build/kdebase4-workspace/BUILD/kdebase-workspace-4.3.1/kwin/lib/kdecoration.cpp, line 389")
    at global/qglobal.cpp:2042
#10 0xb72e0e3c in qFatal (msg=0x6 <Address 0x6 out of bounds>) at global/qglobal.cpp:2241
#11 0xb72e0f35 in qt_assert (assertion=0xb7034830 "dynamic_cast< KDecorationBridgeUnstable* >( bridge )", 
    file=0xb7034790 "/tmp/build/kdebase4-workspace/BUILD/kdebase-workspace-4.3.1/kwin/lib/kdecoration.cpp", line=389) at global/qglobal.cpp:1811
#12 0xb7029e50 in KDecorationUnstable (this=0x8b21f90, bridge=0x8ab524c, factory=0x8ab8530) at /usr/src/debug/kdebase-workspace-4.3.1/kwin/lib/kdecoration.cpp:389
#13 0xb7034082 in KCommonDecorationWrapper (this=0x8b21f90, deco=0x8b08360, bridge=0x8ab524c, factory=0x8ab8530) at /usr/src/debug/kdebase-workspace-4.3.1/kwin/lib/kcommondecoration_p.cpp:36
#14 0xb70327c6 in KCommonDecoration (this=0x8b08360, bridge=0x8ab524c, factory=0x8ab8530) at /usr/src/debug/kdebase-workspace-4.3.1/kwin/lib/kcommondecoration.cpp:53
#15 0xa94542b2 in QuartzClient (this=0x8b08360, bridge=0x8ab524c, factory=0x8ab8530) at /usr/src/debug/kdebase-workspace-4.3.1/kwin/clients/quartz/quartz.cpp:554
#16 0xa9455b7f in Quartz::QuartzHandler::createDecoration (this=0x8ab8528, bridge=0x8ab524c) at /usr/src/debug/kdebase-workspace-4.3.1/kwin/clients/quartz/quartz.cpp:179
#17 0x0805d40c in KWD::Window::createDecoration (this=0x8ab5238) at window.cpp:799
#18 0x08061c94 in Window (this=0x8ab5238, parentId=0, clientId=0, frame=0, type=KWD::Window::Normal, x=0, y=0, w=1, h=1) at window.cpp:158
#19 0x080590e4 in KWD::Decorator::enableDecorations (this=0x883aec8, timestamp=49947, damageEvent=104) at decorator.cpp:223
#20 0x08051354 in main (argc=1, argv=0xbf839304) at main.cpp:177

Reported using DrKonqi