I'm setting up a SharePoint Site where the masterpage is built using one of the existing masterpages as a starting point (Blue Band).
When I test the site while logged in as the super admin, everything looks fine. But if I log in as a general user the default masterpage shows as Blue Band again.
I'm guessing there must be some permissions problem where the new CSS isn't allowed to show. It appears to just be the CSS as the placement of elements is as per the new master page.