This happens to me as well, Radeon 9250 128MB... but it goes a step further. If I leave the programs running for a while... say 10 minutes, without using them, when i reopen the program, it gives me a fatal windows error, and shuts down the program. This is usually only in MED, however, I have seen it in WED as well... MED also crashes after I come back from a full screen "engine preview"... If I leave the engine preview in window mode, it dosent crash. Not sure whats going on, but I have asked befor, and didnt really get a straight answer. Thanks.