I'm running stable 22.214.171.124 on Debian Squeezy. Delighted to see the APS installer pop up on there, a very useful tool I'm sure and one I'm keen to tell my clients about. Unfortunately the APS installer only appears for admin users. I'd have assumed that it would be available to clients but of course limited to their own sites. Is this by design or is something up with my ISPConfig install?