X crashes when moving mouse

[Marko Cehaja <marko@magikomik.de>]

I have Slink 2.1.

When I start X, either via XDM or via startx, switch to konsole, switch back 
to X and in the same time move my mouse vigorously (or accidentaly) my X 
crashes.

If I leave the mouse while switching to X for couple of seconds, everything is 
alright.

I have ps/2 mouse and it works fine. The crash comes when switching to X and 
in the same time trying to move the mouse (which doesn't move on the screen 
for couple of seconds).

What is this and how to get rid of this? This makes my work very unsecure, as 
it has a big risk to crash my applications, if I start using X immediately 
after the switch from the konsole.

Marko