So I spend 3 hours yesterday reinstalling lion and MANUALLY copying over settings from my old bugged account in lion (where you can't uncheck sharing on the main admin account), so now I have a new share only account and I can select and deselect correctly (woohoo for small miracles) however when I reboot I have select and deselect file sharing for it to work, otherwise all my windows pc's require me to enter username and password and the share account one doesn't work. I tick and untick file sharing and BAM works like a champ. Really wish apple would fix this. Totally unacceptable that this got past testing, and what's worse is I can't go to SL because this is a new mini.