This is a strange one mate, I am convinced that this is a session cookie problem. Any firewall should have absolutely nothing to do with this problem, but I have seen some strange things before.
I have seen a similar problem before, but that was a while back with an older version of the forum and an early Firefox 3. It wasn't near this consistent though, and only happened occasionally. This may have something to do with the way the website communicates with your browser, in other words, encryption. Have a look at your Options again, go to the Advanced tab, under Protocols check and see if both Use SSL 3.0 and Use TSL 1.0 are checked. I am using Firefox 4, but I do have a few other extensions installed than what you have. They are mostly just cosmetic and don't affect they way Firefox communicates. I do however also have ABP and Noscript installed, both have exceptions for PA. I am also using an extension called
HTTPS Everywhere, basically, it forces almost any web page you are accessing to use a secure connection, if the webpage supports it. It adds an S to the end of the HTTP in the URL when it is active. I have never seen the forum or the main page use HTTPS, but that addon is really the only thing that is different between what we are using. Just to eliminate the possibility of a problem, I installed Surf Canyon to make sure that it was not the culprit, and I re-edited the post above, even changing attachments, without a problem.
I don't think that it is a PA problem, but if we keep this thread alive long enough, Keith may notice and have something to add that I am missing.
