The Beta channel has been updated to 34.0.1847.60 (Platform version: 5500.55.0) for all Chrome OS devices except for the Chromebook Pixel. This build contains a number of bug fixes, security updates and feature enhancements. Here is the chromium changelog.
If you find new issues, please let us know by visiting our forum or filing a bug. Interested in switching channels? Find out how. You can submit feedback using ‘Report an issue...’ in the Chrome menu (3 horizontal bars in the upper right corner of the browser).