Display issue

[Gringot]

I had to recently change my PC.
It is now equiped with a Intel mobile 4 series graphic card.
I'm running ubuntu 10.10 updated (kernel 2.6.35-22).

In order to use this new card, I had to install the dynamic library libtxc_dxtn.so as described in this thread :
http://regnumonline.com.ar/forum/showthread.php?t=31371
It works but all characters are black while other objects are quite well displayed (some branches in trees are black too).
When I hover the pointer sometimes some flashy colors appear on characters, some cloths parts of the character may appear and disappear after a while

My game setting is shader model 2.0. I don't use desktop effects
I tried lowering some game settings as low definition in details, water ...
I tried setting S3TC texture compression to yes in driconf
Still same trouble.

Using the setting shader model as Pipeline works not too bad

May be the libtxc_dxtn.so lib is outdated ???

Is there anybody to advise how to set some parameters somewhere ??

Thanx in advance for your feed back