Microsoft is releasing a new, mandatory, update for Xbox 360 consoles worldwide today, which fixes a few issues with the system.
Major Nelson posted about the update on his blog, “I wanted to let you know that the team has just released a system update for the Xbox 360 over Xbox LIVE.,” he said. “Starting today when you sign in to Xbox LIVE you’ll receive a prompt to accept this mandatory update. If you are signed into LIVE already, you may be signed out and asked to accept the update and you’ll be back online in a few moments.”
“In this update, we are correcting some issues such as displaying the incorrect playlist name when launching a playlist from Xbox SmartGlass to the console, an error with Xbox Video closed-captioning and an error with Xbox Music that some were experiencing.”
So unless you are using Xbox SmartGlass or Xbox Music this update won’t affect you in the slightest, however it is still mandatory so expect it to begin downloading next time you log in.