Has anyone else had this problem. Its when playing something like Halo or Unreal2 when Im moving and have multiple cursor buttons pressed. Eg, I can have my finger down on the forward cursor then if i press the left cursor at the same time i would expect to move in a diagnal direction. This doesn't happen I will either stop completly or just straf left. ??? This only happened when I changed to XP and ive checked my keyboard on my old PC and its fine. Any ideas guys? Also when I hit the tab button to get the scores in CS the menu flashed twice as if it registers two key strokes.