Graphic corruption in 3D mod with Penryn Macbook Pro

Hello,
I have the last Macbook Pro, 15", 2.4 Ghz Penryn, Nvidia Geforce 8600M GT with 256 of VRAM.
Leopard 10.5.4 (combo) and Leopard Graphic update 1.0 are installed.
I have the following problem : in 3D mode, with graphic acceleration, when paning vertical objects are torn appart. It happen with UT2004, Prey, Quake IV, Colin Mcrae Rally etc... and I have done a full clean install and all software is up to date.
Please advise. Best regards,
Arno

Well I cannot offer any suggestion as to a fix, but FYI your video card has been in the news quite a bit the last few weeks. Heres an example:
http://www.engadget.com/2008/07/10/all-nvidia-8400m-8600m-chips-faulty/
Do a google search and you'll find more on the topic.

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