i have to log in each time i want to post in the forums, I can't comment on posters at all. I'm really sad here.
Have you tried registering another user name? That fixed Kevin Jones..
Have you tried a different browser? That fixed philaarts.com
Other than that.. all I can suggest is to delete your cookies, play with your security settings in the browser, and make sure that your not running any cookie-muncher software or anti-ad-popup software.
99% of the users work .. I'm stumped why 4 people are having this problem.