I set up my wife's new Mac Mini (Duo, 2gigs memory, 120gig HD) and it was acting very strange. It kept dropping the bluetooth connection, then dropping the airport connection. system profiler would sometimes see the wireless hardware, and other times not see it. It was peculiar. So I ran the hardware test and got the following error: 4MEM/5/400000000 The odd thing is a ran the test again, and then again, and again, and the test found no errors at all. So I rebooted, and now the mini works fine. Any idea as to what to make of this. The mini has been working fine for the past 24 hours. I know the safe thing would be to take it into Apple, but I don't have a lot of free time. Any advice or idea what the heck was wrong with it?