@remus said: I think its probably a problem with the ATI driver. Have you tried selecting the 'correct reverse picking bug' option in th openGL settings? Hi Remus and tx for the super quick answer. I did indeed tried out that option too but it didn't help. Also what I've forgot to mention is that I have a dual boot XP/Vista. The same behaviour occurs also with Vista (it's even slower to zoomin/out)