Well not knowing what the bug is, and just looking at the changes bettween RC1 which I downloaded and the patched files, and then looking at my vB3 Gamma files, the lines that changed were the same in vB3 Gamma as they were in the origional RC1, so I've edited them to be safe as I'm not planning on upgrading yet.
The sad thing is that this is going to delay me releasing my hacks. I am about to release my massive admin/ warn/ suspend/ ban hack... but can't do it without RC1. GAH!