This release is worse than rc6.
Associations on a B radio (XR2) went from excellent to completely unusable -- links that were at 60% are now showing up at 80%, and connection quality dropped from better than 70% down to below 20%.
I upgraded because the hotspot just would not do RADIUS authentication in RC6. It didn't even bother trying to send packets out to my server. Up until that point in the login process, hotspot works fine. But without that, i's useless to me. And now with the link quality problem, I can't even test whether RADIUS is fixed. I'm using the same config that works fine on 2.9 routers (rb532's).
As far as I'm concerned, this is no where near a proper release candidate. The fact that they're up to RC9 is indicative enough that 3.0 is not anywhere near ready for release. Unfortunately we're stuck with it on RB333's.