If you have an ATI video card > 8500 like me and are running SuSE 9.x you should be aware that ATI has released a new driver for linux.
Also Novell has been kind enough to produce a modified version for SuSE users. This has fixed 90% of the problems I was having with Planeshift so you may wish to go to
http://ftp://ftp.suse.com/pub/suse/i386/supplementary/X/ATI/suse92/i386/fglrx/8.8.25and get the 2 files and read the readme, make sure to follow the directions exactly since it will hose your system if you screw it up.
Also make sure to properly set your environment variables for planeshift since the Linux installer does not appear to do this for you.
Almost forgot one other thing that should help you whether or not you are running SuSE 9.x is to make sure to run ldconfig as root after installing and before running the program. This will refresh the dynamic linker cache, and may help with some of the strange errors I have seen posted to the board.
And Finally one things that may help if you get strange errors about Xlib and not being able to connect, you may want to try a simple reboot of the computer, no idea why but this actually worked for me

Hope This Helps!