Edit conflict is not handled.
If A edits and B edits and saves and A saves, then the plugin should make an effort to either merge the save, inform the user the save is blocked, or some other mechanism. At the moment the second save blows away B's changes.
-- CrawfordCurrie - 27 Jun 2011
This of course only applies to saves from JS (non-JS saves are done through the standard save mechanism). I added conflict detection, and a response back to the user inviting them to refresh the page before saving again.
-- CrawfordCurrie - 28 Jun 2011