I use IE9 + Win7 64 and whenever I log in it says I've logged in fine, but clicking to any other page on the forum shows that I'm actually either not logged in or get logged out. Been going on for years, literally. Rick at one time mentioned a possible fix, but it really didn't do the job. It's here and any other .threads forum I visit/run. I have to switch to chrome or some other PITA.
Oh, happened just a few minutes ago, which is why I complained
Clearing cookies/ logging in and out don't do anything.