Umbraco "Object moved to here"

The mains thread for this can be found at:

http://our.umbraco.org/forum/ourumb-dev-forum/bugs/8107-Object-moved-to-here-error-on-sign-in-or-out-using-membership-package

Basically an issue with the homepage in an Umbraco website, when logged in you get a "Object moved to here" header with a link to self. One answer is to check your hostnames in the content section, one of mine had a trailing forward slash (/). Once I removed  that it worked again.

Strange one...