Well I reinstalled Vue Inf. and no problems yet. It also seems to be running a lot faster now, but I still feel there is a conflict somewhere. Wabe, you said: "What else is running in parallel to Vue? We had some similar problems here a while ago on OS 10.3.9. We started Infinite without ANY other program running in parallel and then tested it step by step until we found the pair that does not work together. You should do the same i think." How did you do this testing step by step?