There's a list of Linux Quake III Arena Known issues on the id Software site letting you know if any problems you and your penguin-powered PC are encountering are common, or unique to you (or at least not previously noted). The update offers applicable tips and workarounds, along with where to send feedback about bugs you are encountering that are not mentioned. Thanks Jacek Fedorynski (who actually sent this news along a couple of days ago).