The chatbox has been moved to its own page. Unlike the full screen pop-up chatbox, the chatbox page has other elements added to the page as well as the chatbox. It has been removed from the forum page because the forums are for ....... posting.
You can access the chat page, accessible to members only, by clicking on the 'chat' button on the hanging navbar. On the chat page you'll find the Recent Topics, Forum Index, Who Is Online, Poll, Search, and Statics widgets.
Portal (Home) Page:
The portal page has been changed to include those elements most important to the site and those elements which will be the first impression given to all visitors. Once members sign up on AD, most tend to bookmark the forums page, mainly due to the chatbox, instead of the home page. It would be a good idea if members frequently checked out the home page because sometimes special notices or adverts will be placed there that may not be so easily or readily found in the forums, as well as some links that can't be found anywhere else on the site.
If you have any questions, please don't hesitate to ask, but know, that at this time, the decision to remove the chatbox from the forums page is most likely final.