netbook-launcher woes on a dell mini9 / karmic koala

[Qwill]

Hi,
I have a Dell mini9 under karmic koala UNR.
I installed and played with gnome-shell for a while, then decided to
uninstall gnome-shell and return back to the good ol' netbook-launcher.

Alas, at the launch of the user session, it crashes continually,
provoking a high cpu load.
error msg says : 
do_wait: drmWaitVBlank returned -1, IRQs don't seem to be working
correctly.
Try adjusting the vblank_mode configuration parameter.
Erreur de segmentation

Have you ever seen this ? Any ideas what causes this crash ?

thanks,
Qwill.
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