dri problems on radeon 7500 [M7] doing ufo:ai

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Dear DRI-list users...

...first I hope Im not offending anyone placing my question here. I as
well as parts of the devel-crowd of ufo:ai (http://ufo.myexp.de) tried
to track down the problem discribed below but failed to make a part of
the game nor my config responsible. So as it looks like its more a
problem with the oss driver than the config or game I thought this might
be the right place to find assistance / hints.

The System:

- -ibm t30 / radeon 7500 mobility [M7]
- -debian etch / x.org / snv ufo:ai
- -glxinfo / xorg.conf / glxgears look absolutly ok ( but if its any help
I will send (relevant parts) of them cause)

The Problem:

ufo:ai is an oss game using the famouse quake 2 engine (in an extremly
modified way through), rendering is done via glx.

on bootup everything, including the open_gl renderer, is started
perfectly  except those lines:
 [code]
...GL_EXT_point_parameters not found
...using GL_ARB_multitexture
...using GL_EXT_texture_env_combine
...GL_SGIS_multitexture not found
...ignoring GL_ARB_texture_compression
...using GL_EXT_texture_filter_anisotropic [16 max] [ 1 selected]
...using GL_EXT_texture_lod_bias
...using GL_EXT_stencil_wrap
...GL_EXT_fog_coord not found
...GL_ARB_fragment_program not found
...GL_ATI_separate_stencil not found
...max texture size:
......detected 512
...SDL_ttf inited
[/code]

Ingame itself problems vary from missing texture, wired fonts to mess up
models leading to a completly unusable programm.

People using the nvidia/ati probitarian drivers after encountering those
problems fixed em doing so. which obvious isnt an option to me.

If anyone has a hint how to improve the situation or what might be the
reason for the problems discribed, if they are driver-related (as the
dev department of ufo:ai said) I would be vary grateful. And so will
others as meanwhile it turned out other people with same hardware /
driver config have exactly same problems.
Eventualy, thanks for your time and hope I didnt ignore any list rules.
Best regards, Eric.
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