Okay, some more info to clarify: I am a registered user, can log in to my account and can get to the updates. However, I cannot get to the registered user forums. Not when I'm already logged in, and not when I log in right after clicking "Registered User Forums". What I meant by a clean install of Firefox was that it never had been installed before and I did not let it import any bookmarks/history from Opera/IE. So there should not be anything cached to confuse Firefox. I've tried on both XP Pro SP2 with Sygate Personal Firewall (on/off) and 98SE with ZoneAlarm (on/off), and with the firewall turned off in my Draytek router/modem - built-in modem so no way to take that out of the equation. Although it doesn't really make sense that I can log in and then not get to the forums. I should just try it on someone else's pc, and I will if I remember, but it's not that important with these fine forums at Renderosity. :) But I'm open to any suggestions, because I am rather curious to find out what the solution to this problem is...