Fix bug 28795 - Added a notification says "xxx is synched." if you are already synced and click that button.
Linux
Fixed bug 28061 - Add popup support for page action extensions.
Known issues
Mac only: bug 29121 - You'll get an error when checking for updates using the About Google Chrome dialog. 'Update server not available' (error : 12). Regardless of the error message, the update is successful.
[MAC] (Issue: 29121) If a user clicks "Set Up Automatic Updates for All Users" and later clicks "Update Now" from the About Box, an error 12 will be displayed. The product is updated successfully; restarting the browser will apply the update.
More details about additional changes are available in the svn log of all revisions.