The permissions check I put in is for multiple galleries. If you have say 5 galleries and a user can only see 2 of them, then they will only see images from those 2 galleries. I'm not sure if I can put in permissions on if someone can see a cms block or not, I'll check through for a way to set the groups that can view the block at all and not display it at all if they can't.
Yeah I know
I can set permissions to not display the sidebar block and forumhome block, but I can't figure out how to do it for the CMS. Not sure if it's possible, I'll keep checking though.