Okay, should see that I created a temp user. After account creation/login, went to a product area, then went directly to the logoff url.

Had following results:
On screen: Error There are too many redirections for this web address. With a try again button.
Header: Error moved temporarily.
URL remained the same. Trying "button"... Didn't work. same place.

So what's in the base site? Have an .htaccess file? Have one in the current directory? Otherwise what are the settings in the admin/configuration/sessions menu?