I recently encountered the infinite redirect loop when I accessed my Google Groups website. I didn't know why. I tried with another PC and it was good. Also tried with Google Chrome. Then it was good. Just one PC with Firefox is not good. Upgrading Firefox to version 3.6.3 didn't resolve the problem.Finally I deleted all cookies and could connect to my Google groups website.
I referred the following website.
http://support.mozilla.com/no/forum/1/700930
