This issue has been posted in the Xbox 360 Preview forums. We're aware that this issue is affecting a multitude of users in the Xbox 360 Preview and some users on the public build and are investigating and working towards a solution.
Thank you for your feedback.
Did this solve your problem?
Sorry this didn't help.
Great! Thanks for marking this as the answer.
How satisfied are you with this reply?
Thanks for your feedback, it helps us improve the site.