I havent ran into that, but I havent ran it on a too many systems that where part of a domain.
I have a customer who I have set up on a domain, I can run it on there and see if it I can get it to happen.
I am not sure what repair would cause that since none of them target anything to do with the domain.
Reg and files permissions wouldnt do it, and most of the other repairs are registering files and repairing services. I wonder if perhaps the repair winsock repair might do it some how?
If you get a chance try 1 repair at a time, I know that will be a pain, bt it would help trace which repair is causing the side effect for you
Shane