I've never experienced this before, just want to see if anybody else has seen this happen. I just updated ROM Manager from the Market, downloaded the new bugless beast, and rebooted into recovery to wipe system/boot/data/cache. Went to install zip, selected clockwork, went through petes folder and no zip was found. Backed out and went to 'backup' in clockwork and no zip was found. At this point I was thinking "ah shit", but when I went to the nandroid>restore option my backup reloaded fine.