No special affinity is set.  Only one thread is actually doing any work, the rest are pretty much idle.  This is pretty much what I see when I check the machine.  I wanted to run more than one server on here but I haven't yet because I don't want to add more variables to the problem.

I put a packet loss column in the webadmin.  Not sure how packet loss is represented in UT3 but the higher the number the more packet loss.