Ultimate Facebook - 404 redirect on subblog login

What is the correct way to setup the login redirect in Ultimate FB?

It's fine on a main blog, but as soon as I login in a admin section of a subblog like on this test site, it redirects to this URL...

:disappointed:tmbcopytest.info" target="_blank">http://faisal.tmbcopytest.info/http:disappointed:tmbcopytest.info

(that's on SITE_URL with / )

Leaving the box blank does the same.

Any suggestions?