nVidia have released version 4.00.26 of their MAXtreme drivers.

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Some highlights from the release notes :
· MAXtreme install should now work when both max 4 and max 5 are installed.
· Windows XP + Quadro DCC; Transform manipulators now show up properly.
· axis draws correctly/in the right place under max 5
· no more model corruption (Ed: hopefully)