Simple fix to an annoying problem. Thanks for taking care of this. We're going to want to upgrade our install with this immediately. Committed in r1902.
Don't try to log in infinite number of times.
Review Request #813 — Created April 13, 2009 and submitted
In some cases (which I'm still not 100% clear on), the post-review cookies can get messed up. This causes post-review to go into a recursive loop trying to log in. This is a simple fix which appears to solve the problem.
Using a cookie file that I could reproduce the problem with, I verified that it asked for my login after failing to post using the existing cookie. I also verified that with a good cookie it still works, and with no cookies it asks for your login as expected. I imagine you could reproduce this by editing post-review-cookies.txt and mangling the rbsessionid.