I purchased Thief Gold from GOG some time ago, and have played it a bit without issues. I'm trying to get back into it now, but whenever I start a level or open the options from the main menu, it crashes to the desktop. Movies seem to be working fine, though. Doing a fresh reinstall of the game didn't seem to help either.

Any ideas on a fix? For reference, I'm running it in Windows 7. Video card is ATI Mobility Radeon HD 5470 (I've updated the drivers since I last played, but now it doesn't work with either the updated drivers and with the rolled back versions.) Thanks in advance.

try the fix from the sticky topic.