This build contains a number of performance, stability and security improvements. Additional changes:
- Fixes to login problems that users may have encountered on machines that were shipped with versions R11 and earlier.
- Updated Pepper flash version.
- 25557 & 25559 - Hangouts will not display video of yourself or participants on Chromebooks. Audio does work, and other Hangout participants will be able to see you if video is enabled. This problem does not affect GTalk Video.
- 25509 - Occasionally when switching tabs, the screen will not redraw the content to the new tab. Workaround: Closing all tabs or restarting the machine resolves the issue.