The Dev channel has been updated to 4.0.249.27 for Mac.

Mac
  • [r33490] Disabled extensions. (Issue: 29086)
  • [r33556] [r33768] Added more localized string translations.
  • [r33803] Fixed download dialog truncation in German locale. (Issue: 23178)

More details about additional changes are available in the svn log of all revisions.

You can find out about getting on the Dev channel here: http://dev.chromium.org/getting-involved/dev-channel.

If you find new issues, please let us know by filing a bug at http://code.google.com/p/chromium/issues/entry.

Anthony Laforge
Google Chrome Program Manager