A new alpha of the new port has been released. It has some minor fixes such as:
bullet puffs appears where they should most of the time and the new clipping algo should be faster... Also, I think there are no more sprite in floor and ceiling problems
So head on over there and download it, since you have to wait around for one of our lazy LPBs to mirror it here. Until I get a cable modem or something, then I'll do it myself. But since that isn't going to happen anytime soon, we'll all just have to deal.