A new mandatory Xbox 360 Dashboard Update rolls out from today.  The Update should appear the next time you sign in, and corrects “some issues” with Xbox Music, Xbox Video and SmartGlass.

According to the good Major Nelson:

“I wanted to let you know that the team has just released a system update for the Xbox 360 over Xbox LIVE. 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.

“Thanks and we will see you online.”