For those unaware, the beta of patch 1.5.0, the Arcade patch, is currently live on StarCraft II. This patch introduces the new platform for playing custom games, the Arcade, and loads of new features along with it.
Blizzard has posted that a "patch" for this beta patch has been put into effect, which consists of bug fixes regarding streaming and stability.
A new patch has been released for the Arcade (1.5.0) Beta! This patch addresses several bugs related to the streaming experience, along with other fixes to address various stability-related issues. We appreciate all of the feedback that you've provided so far, and we look forward to your continuing participation in the Beta.
Battle.net - New Arcade (1.5.0) Beta Patch Now Available