I'm kinda getting a feeling that the only problems arise when there's more than one U3 plugged in? Has anyone had the same problem with just one U3 running?
This is pretty much what I've encountered. I have 3 miners running for 7 days and 1 hour on three different computers, in that time, one slipped from port 0 to port 1, but it's still hashing fine.
http://solo.ckpool.org/users/14LxDWtRRdQAbnJdd4Ew5jwag8Bx9UfNRd