Alex997 - 10:33 pm on Jun 1, 2012 (gmt 0) [edited by: tedster at 5:55 am (utc) on Jun 2, 2012]
Video from Google out today that explains what happens to the review stars in places:
Perhaps this migration to local Google+ is messing with a lot of the rich snippets results.
[edit reason] Link directly to the video [/edit]
[edited by: tedster at 5:55 am (utc) on Jun 2, 2012]