Google has released a new update for the dev channel of Chrome browser. The new revision has incremented the build number to 25.0.1354.0 and it is available for all supported platforms (Windows, Mac, Linux and Chrome Frame).
It looks like the Chrome development team is preparing a fresh New Tab page because the most significant change in this revision is a test of new variations. However, these will not be released to all users of Google Chrome Dev as the team makes them available only to a small part of the community.
Google Chrome Dev is not a stable version of the browser. It is designed for testing new features and using it may lead to losing browsing data.