Another service snafu:
http://www.washingtonpost.com/wp-dyn/content/article/2010/05/29/AR2010052903029_pf.html
I'm inclined to the view that claiming the award was no accident. On the other hand, he'd evidently served honorably, given the medals he won legitimately. It's not exactly like forgetting whether or not you served in 'Nam. So there's some definite puffery going on here, IMO. Whether or not it's fatal only time will tell.
During my service I was assigned to units that had been awarded Unit Citations and Presidential Unit Citations. During my time there I was authorized to wear those ribbons. But since I hadn't been assigned to those units at the time the awards were made, those medals are not a part of my record--I can't claim them, can't wear them.
This stuff can get tricky. Remember Admiral Boorda? Chief of Naval Operations who killed himself, at least in part because of a controversy over whether he was entitled to wear a "V" device (for valor) on one of his ribbons. Professionals take this stuff very seriously.