We have been actively looking into this issue since it was reported, but have not been able to reproduce it in an environment that allows us to debug what the issue is. So far this has only happened on retail versions of the game. We are doing our best to get this solved quickly.
So please keep providing any and all information that you have.
Could people experiencing this please again confirm that all reported cases have comcast internet, as this seems to be the only common thread so far?