User blog comment:Dopp/Technical Update: November 15, 2011/@comment-954127-20111116194759/@comment-1656630-20111116213831

So there's two bugs going on here...

one is that error messages are appearing as instead of as actual message text. This was a messaging and caching issue which has been resolved, and you'll see them shifting to actual error message text now.

the other (far more important) issue is why the errors are appearing at all. We haven't quite found the pattern yet -- the tables theory is close, but we also see some imagemaps inside tables that work fine. We're still digging over here, but if you catch onto the pattern before we do, please let me know. :)