I've spun off https://bugs.launchpad.net/mahara/+bug/1250302 for the separate issue of a site admin being unable to edit site skins if they belong to an institution with skins disabled.
I've spun off https:/ /bugs.launchpad .net/mahara/ +bug/1250302 for the separate issue of a site admin being unable to edit site skins if they belong to an institution with skins disabled.