Version: 0.12.7 (using 3.5.9, Kubuntu (hardy) 4:3.5.9-0ubuntu7.1) Compiler: Target: x86_64-linux-gnu OS: Linux (x86_64) release 2.6.24-19-generic If after arrival of the message to press in an emerging window to open, with probability of 50-60% all to fall, as by pressing Ctrl+Alt+Backspace.
With that information it is impossible to reproduce that crash or locate the cause. Please provide more detailed infos like: -your video card and driver version -your /var/log/Xorg.0.log right after the crash -what window manager do you use? default kwin, compiz-fusion, etc.
Created attachment 26818 [details] log after crash
Video - 01:00.0 VGA compatible controller: nVidia Corporation NV43 [GeForce 6600 GT] (rev a2) Driver - ii nvidia-glx-new 169.12+2.6.24.13-19.45 NVIDIA binary XFree86 4.x/X.Org 'new' driver ii nvidia-kernel-common 20051028+1ubuntu8 NVIDIA binary kernel module use kwin.
Looks like bug 155226.
*** This bug has been marked as a duplicate of bug 155226 ***