Google has pushed a new Stable channel update for Chrome OS. This would be version 23.0.1271.84 (Platform version: 2913.168.0), and is specifically for the new Samsung Chromebook.
The update fixes an issue in which the black screen is sometimes seen after resume. There are also some additional stability fixes. A known issue with the update is that there is still a black background on the login screen occasionally.
"If you find new issues, please let us know by visiting our help site or filing a bug," the Chrome team says in a blog post. "Interested in switching channels? Find out how. You can submit feedback using ‘Report an issue...’ in the hotdog (3 horizontal bars in the upper right corner of the browser) menu."
The hotdog? It's actually been called that for a while, but I'm not sure how familiar the term is to users.
Google says machines will be getting the update over the course of the next several days.