I am curious to know more about American's Jumpseat policy. Last night I tried to hop flight 279 ANC - DFW and my best bet was a jumpseat on the flight deck since the flight was over-sold and there were 20 non-revs listed. However, the ticket agent refused to list me as cass approved jumpseater. Her reason was that the flight is a contract flight for Northern Air Cargo (also a cass airline) and only flight crew employed by American could ride on up front. This sounds to me like the classic "my kingdom" inspired rules that some times get made up on the spot. Just curious if anybody else has encountered this or if there are any American employees who can verify if this is the case or is the gate agent full of you-know-what. Needless to say I just walked away, but I was not at all happy that my jumpseat priveleges were denied. There was no way I had a chance at a seat in the back. It left a bad taste and I will definitely spread the word.