UPDATE 2008-11-1: Yay, Autodesk are posting status updates to the Discussion Group Help Page. One important point is "default search is 90 days. From the search results you use the advanced search options to refine your search by broader date range and other factors"
I've posted about it before but tonight after trying to research something and reading perfectly rational intelligent posts reduced to unreadable "Blah" by the "improved" new Autodesk Discussion Groups, which like this post have un-invented the concept of paragraphs and mangle punctuation, I came up with a new banner for them as find it annoying that there is a wealth of information which people have contributed just to help others that is being destroyed by a system yet it appears from the lack of comment, or any sign of a fix, that nobody at Autodesk cares.
Thanks to posts reduced to this