It seems that you're using an outdated browser. Some things may not work as they should (or don't work at all). We suggest you upgrade newer and better browser like: Chrome, Firefox, Internet Explorer or Opera
The search term must be at least 3 characters long
It's like a mac user giving out PC advice, though. Anyway, I installed ATITrayTools, and there aren't any "extension limit" settings. [EDIT] Cleaning out 10.6 and installing 10.4 again fixed it. I'll bet it has something to do with the fact that 10.5 an 10.6 were focused on video playback, though I don't know how that affects OpenGL games.
Someone on the forum of Steam found a .dll file which solved the problem for me for Kingpin (as well as Quake II, and the laggy gameplay and cutscenes in American McGee's Alice), try this link : http://www.filefront.com/16696483/atioglxx.rar/ and put the file where your .exe files are located. It may work with other games based on the Quake 2 engine. this is not useful if you use older drivers like 10.4, as previously said.