I have installed version 1.4
Script looks good, pretty clean considering it's a beta.

Problems I have is that when I try to logout of the admin section I get a 404 Page Not Found Error

and the URL looks like this: http://www.rightbrainlabs.com/wallpapers/?p=logout&r=http%3A%2F%2Fwww.rightbrainlabs.com%2Fwallpapers%2F

Also, when I replace the %3A%2F%2F with / and attempt to logout I get a 403 Forbidden Error

and the URL looks like this: http://www.rightbrainlabs.com/wallpapers/http//www.rightbrainlabs.com/wallpapers/