That's weird, works all the time for me.
Do you use "Log me on automatically each visit"? Because the front main page news is also a part of the forum, so if you visit the main page before you visit the forums then it thinks you've already visited the forum. Thus, it won't show any new posts. That's why I log on manually everytime I'm here.
Microsoft believes in making computing easier! What could be easier for consumers than having only ONE choice of software?!?