I'm trying to create groups and limit what blocks a specific group can access. I've used the Group menu to Block Access rights but when I log in as a member of that group everything is still visible. ?? Making this work is going to prevent me from having to create a whole new site just for report viewers. Help!!

Is your account only in the group that you are trying to restrict? If your account is in multiple groups, and one group is restricted and the other isn't, then you will not be restricted because the group that has permissions to view the blocks will still allow you to view the permissions.

I would suggest trying this by creating a test user, and adding that user to your group. Then try logging in as that user to see if the results are what you are wanting.