Looks like a spike goes through the date chin, and the back top of his head.click in bottom right corner to enlarge. http://www.myweb.cableone.net/stackgenerator/050604_Error Coins 002.jpg
Guess I'm blind, sicne I don't see anything. Inany case, proofs aren't "plated", they are polished. So, unless there is something wrong with the copper wash on a cent, plating would not be an issue.