It looks like it is a problem with 5mhz channels actually. After downgrading back to rc4, station psudobridge was working, somewhat, but people were only getting a few hundred kbps of throughput where they normally get 2mbps. We have other test towers running 3.0rc4 with psudobridge just fine, so we know that works, the only difference is that they are all running 10mhz channels, where this tower is on 5mhz... I'm going to email support about this in a few minutes.
the problem lies with having the framing policy enabled on the AP and station psudobridge on the client enabled. the problem has nothing to do with 5mhz channels at all, with framing policy enabled, station psudobridge does NOT work correctly, disable the framing policy and everything is good. - emailing support with details.