Wirelessly posted (Mozilla/5.0 (iPod; U; CPU like Mac OS X; en) AppleWebKit/420.1 (KHTML, like Gecko) Version/3.0 Mobile/4A102 Safari/419.3)
I assume that you've run software update 100 times to make sure there aren't any updates left?
If yes, then I would try downloading the iTunes installer and reinstalling it manually.