High CPU usage for X

Hello I am having some troubles with X and its CPU usage, it seems to spike every few seconds, this is causing other things to slow down a bit. Has anyone seen this? I remember someone saying something about suseplugger causing this, but even with it stopped, CPU usage is still spikey, with X spiking up to about 40% CPU usage. PS its SuSE9.3 ia386 Thanks, H