The majority of fixes in this release were related to stability and polish. Of particular note, we also landed fixes for NTLM authentication and restored the ability to hide the most visited sites on the new tab page. We've disabled plugin click to play for 7.0 (it will return in 8.0 once we've worked out some minor issues).
You can find more details about additional changes in this release in the SVN revision log.
If you find new issues, please let us know by filing a bug at http://code.google.com/p/chromium/issues/entry