It's a real shame. They did some kind of software upgrade that dumped all the threads from all the individual film forums into the 'general discussion' forum, and didn't warn anyone in advance as far as I know. Certainly not the MD board. The silver lining (if there is one) is:
1. The GD forum is still searchable and all the threads are still there in the dark recesses if you know what you're looking for and can hit upon the right combination of keywords.
2. There are hundreds of threads linked on the pages of the main site here thanks to Bob which will give you the background discussions to the extracts that make up the content of the pages.
Here's the GD board, tho I think you will have to have registered to search it.
http://www.rottentomatoes.com/vine/forumdisplay.php?f=2I wondered if the Wayback Machine had archived it, and you can get to various versions of the forums indexes on RT (for example here:
http://web.archive.org/web/200508280250 ... .com/vine/) but if you scroll down and find the MD forum link it says it hasn't archived that board.

Gone forever in its original form, sadly. But at least we have the site and forums here to keep things going.