I might have a program that mess with cookies. I use Norton Internet Security, but I don't think that touches cookies. IE7 seems to have the same cookie handling system that IE6 has. I added the game to the exceptions list, so cookies are always allowed. Maybe that will fix the session info issue.
It didn't fix the IE7 bug with the tables not loading properly (and this is still the only site that seems to have that problem). But I am dealing with it.
I also tried adding the site to the trusted sites list, but have had no improvement with the bug. I am running out of ideas for my side.