I didn't think of looking at the structured data until I saw your post, ive been concerned with a huge drop on the 5th June and can't see why at the moment. Other sites seem ok with the structured data so I'm not sure.
I'd say I have lost 90% of my rich snippets in the last week.
I use LocalBusiness, Product, Events, and another type. All vanished in the SERPs. My home page was first to go. I recently increased the number of pages with rich snippets on, so either that triggered some kind of ban or google has recently changed things their side.
I posted about this here a WMT about a week ago. It seems that ALL rich authorship snippets have disappered for our site's home pages. The only rich authorship snippets being shown now are for some of our inner post pages.
I'm seeing another drop today (7/16/2013) on hcard sites. Is anyone else seeing this? If so, what format are you using? Just curious if Google is using its weight to snuff out those formats which are not in its future vision of being "the standard."