http://code.google.com/p/gmaps-api-issues/wiki/JavascriptMapsAPIChang...
(If the groups interface cuts the link off, you can find it in the
wiki tab of the issue tracker).
As usual, please discuss any potential issues in this forum (http://
groups.google.com/group/Google-Maps-API/) if you think there is a
regression. Once others confirm your suspicions, report it in the
issue tracker (http://code.google.com/p/gmaps-api-issues/issues/list).