Scott
that is strange, the html is, as you state, identical and benign. Can you confirm after putting this "faulty" one back, that if you use a browser in privacy mode (and/or flush everything out) that you still see the issue? Does this loop happen on the initial redirect, or, after you press "I Accept"
Suggestion, put the CP to http (in the CP profile, allow http) , clear your browser cache, start wireshark, browse to some http:// website and capture what goes on, have a close look at the 302 redirect that comes back, it should be pointing to your login file.
append the wireshark cap here if you like
regards
-jeff