The Beta channel has been updated to 29.0.1547.49 (Platform version: 4319.59.0) for all Chrome OS devices. This build contains a number of bug fixes and security updates.
If you find new issues, please let us know by visiting our help site 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).