Any word on the cold boot issues the B2 boards had?
Is it fixed with the B3 rev.?

I have mine running for over 1 month now, and after the first major issues I had with the board, it seems to run ok now for the past 2 weeks.
Very rarely, I get this booting issue, where it hangs when trying to detect the IDE drives, but other than that, it runs fine now.

If the new B3 rev. seem to be a lot better and most issues are fixed with it, I might swap mine out for a new one.
I will buy another board sometime later to change another rig I have running, but I'm not sure if I'll spend this kind of money for a UD4 (which is way overpriced, IMO).