Last Friday (February 13, 2009), an update for XNA Game Studio Connect was released via Xbox LIVE Marketplace. This update is described in more detail in this post on Michael Klucher's blog. To quickly summarize, some changes were made to allow developers to debug and peer review scenarios that previously were only available after a game had been published to Xbox LIVE Community Games (specifically, the Community Games splash screen and the trial mode expiration screen).
If you are using XNA Game Studio 3.0 for Xbox 360 development and already have XNA Game Studio Connect, you don't need to do anything special to get this update. It will be automatically offered to you the next time you launch XNA Game Studio Connect.
As always, if you have any questions or comments about XNA Game Studio development, please check out the following resources: