I've just gotten and installed Muzzled and every time I attempt to leave West Wallaby St (I assume I need something to convince the Major to give me the biscuits, or possibly do a little home invasion) the game locks up. It stops as soon as I walk off the screen past the High Street sign. The ambient sounds continue, but nothing else does. The only way to close the game is to kill the process.
Checking in Process Explorer, WallaceGromit103.exe has one of my cores pegged. There's no heap activity that I can see (stopped at 337,868K), although it is constantly doing IO reads. Also, PE's stack trace doesn't seem to reveal anything useful. :(
I've tried restarting the game a few times, and did a re-install letting it check for DirectX updates to no avail. I'm running Windows XP SP3 32-bit.