The problem is a javascript in the Forum template that breaks out of the iframe in the frontpage. Without this javascript, the forum will open in the small block in the frontpage (in HTML lingo, its called an IFRAME). The problem with this javascript, the Forum page does not know the previous page because it merely broke out of the iframe. Technically, it's like opening a new browser window. So when you click BACK, it merely refreshes the page.
Until this problem is resolved, I have no choice but to go back to the OLD Frontpage, and this means we will lose the functionality of the new features (blogs, image gallery, media, profiles, etc..)
It's a tough decision because we had just moved into a new system, but because there are usability issues, the logical step is to go back...