Everything! From normal gameplay to addon installation, it works fine.
What does not
What was not tested
You may experience a few slowdowns/choppiness with the mouse, but gameplay appears to be fine. Some textures in a level like Bedroom or Kitchen may have spots of green on them. I believe this is OpenGL's side of the game, but doesn't really affect gameplay that much. I installed the Return To Blockland addon for the game, and it works out of the box.
|Operating system||Test date||Wine version||Installs?||Runs?||Used|
|Current||Ubuntu 10.10 "Maverick" i386 (+ variants like Kubuntu)||Nov 09 2010||1.2.1||Yes||Yes||Platinum||an anonymous user|
|Show||Ubuntu 10.10 "Maverick" i386 (+ variants like Kubuntu)||Oct 04 2010||1.3.3||Yes||Yes||Platinum||an anonymous user|