My colleague Michael Klucher posted some information on his blog today about an upcoming update that will be available soon for the XNA Game Studio Connect application. XNA Game Studio Connect is the component that you run on an Xbox 360 in order to deploy, debug, test and peer review Xbox 360 games created with XNA Game Studio.
After the release of Xbox LIVE Community Games last fall, we ran into a few issues where the behavior of the game when running in XNA Game Studio Connect didn't match the behavior after it is published and is run as a community game. As a result, there were a few scenarios that were not possible for the developer or peer reviewer to test before the game was published, and in some cases a game that appeared to run fine during peer review would crash after it was published.
The upcoming update to XNA Game Studio Connect is intended to make the experience of running the game during development and peer review more closely match the experience of running it after it is published. The update will be available in the next few weeks, and Michael includes more details about the changes that were made behind the scenes in his blog post so I encourage you to check that out as well.