We're just about to release another patch for Orcs Must Die! It'll be submitted to Steam today and should be available tonight or tomorrow. Here's a look at what's in the new patch:
Added a user.cfg option to limit your frame rate “forceFPS=X” where X is what you do not want it to run faster than (for example: forceFPS=30).
Fix for the Tenderized achievement.
Fix for the fireball achievement.
Switch to a hardware cursor to help people with slower machines.
Fixed up the cursor acceleration option slider to make it more useable.
Fixed up pathing near the doors on Twin Halls.
Fixed the bug where you could have both costumes on at the same time.
Fixed an issue where some levels, like Gatway, would crash the game.
Fixed the text for the costume weapons if you had a particular weaver set selected.