This just started happening a few days ago. When I revisit a thread I've already been to, it just loads up the previous copy from the cache, even though there are new posts.
Oh? I use chrome (love it), and have not seen this issue. Sounds like a royal pain to have to force refresh each thread... I wonder what is causing it. Unless you went into settings at some point and forced on cached return, I am not sure what to suggest. Google has from time to time made questionable updates to their browser, but this one does seem like it would be a huge widespread issue. Do you think maybe your ISP is caching content to 'speed up your internet'?