Since few months ago, when I try to go to my Google Document via http://doc.google.com, the browser will keep on redirecting me to the authenticate page. However this page just has a redirect loop. I have tried on different browser, and some other method which people suggested. Like Clear Browser History/cookies..etc. The result is the same.
Finally, I have worked out how to get around it and go to my Google Document without having the redirect loop problem.
Hope you find it useful.