I am sure these have helped me; I was using 7077 and then an unofficial 7100 build previously. In both installs I had a wierd problem with IE in that I would open a new page and nothing would happen, as in the url would not appear, page not load. No error, it would just stay like that. Same with opening new tabs at times. It was a totally random issue, and I would have to log of and log back on to solve it. With todays build and the updates the issue has been resolved.
(sorry if I didn't explain that properly lol)!