Hi JIm,
One usefull area to look into is your cookie settings - perhaps this new version labels its cookies differently, just enough to fail the inspection of your internet security settings. Apropriately enough, cookies now come in many assorted flavors; and Windows allows you to pick your favorites; and comes pre-loaded with a set of 'likes' and 'dislikes' in that area. So if the forum now looks for and stores the same settings in a slightly different flavor of cookie, your own security program *may* be denying the forum any access to them.

Then again maybe not