I am not sure what to call it but it seems there are more and more complaints on the Google search results this week. Earlier this week, we reported on a May Day round two update and explained how May Day can be patient in it's attack of your site.
- Ranking changes
- Content missing
- URLs not showing properly
- Snippets and titles not showing correctly
- And more...
I am not sure exactly what is going on, but these reports do seem credible. If you want, post examples for JohnMu of Google to review at the Google Webmaster Help thread.