#1 Titles and Description dissapearing when a site: search is performed. #2 Loss of page rank. #3a. (because I can't figure out what Min is saying): Your sites cache of homepage is no longer showing up.
possible (penalty) reasons: duplicate (or triplicate) content high keyword density linking to same site too much linking to off topic sites too many contentless pages
Website not updated often and lack of fresh links makes google consider the page getting outdated. Not a "penalty" as in .. goodbye website from google though of course. But that topic is pretty much covered
Your wasting your time in this thread Minstrel. Not only do these guys not know what the original question was -- what causes penalties, not how do you tell if penalized -- but they have no sense of humour either. Must be a little anal retentive on a Sunday morning.