It doesn't appear that the new .exe is going to work any better than the old one.
It finished a 2653 work unit last night and would not send it. While I let it sit there for a couple of hours to see what would happen I went to the Stanford site and it seems that other people are having the same problem.
I rebooted the computer and it deleted the finished work unit and downloaded another 2653 work unit.
This is on a computer with media center 2005 on it. I have 1 more that is a twin of this one and 1 running Vista Home Premium that also has the new .exe.
I guess I'll just have to wait and see what happens.