[via Stefan Gossner]
You can check out Stefan's post here.
There are a few nasty little quirks in there with regard to MCMS SP2. I think I might hang off installing it for a little bit yet. I'm busy playing with AS2k5 in my spare time anyway.
I think I feel a psychic moment coming on... yes... I think I see something... SP2a :)
Note: This IS NOT official I am just mucking around, but I cannot see MS leaving these sort of issues hanging around for too long.