I am pulling my hair out trying to help a user with a particularly recalcitrant problem. The user is running Windoze XP with SP3, and every time he tries to open or add a new Open Type font or Type 1 font, he gets the message ".otf is not a valid font file."
We've tried everything I can think of, from sfc /scannow to repairing the font folder and checking the atm*.dll files. We've checked that he's not using the switch to use more than 3gb ram (known to cause this problem), and he has a NVIDIA graphics card (not a ATI one, also known to cause this).
Any other thoughts?