My mistake. If you're having problems with ROM Manager, stop using it, but keep updating it when it says it has updates. Hopefully the issues will be fixed. Probably not right away since he's working on CyanogenMod at the moment, but with the RC-3 that just dropped they're probably coming close to a final release. Then come the tweaks, but those are less-intensive than the overall ROM.
IIRC, Koush doesn't come here very often, but I might be terribly mistaken.