'GA' maps to '**' in Fares/PSH Method?
When I enter 'GA' as the airline in the Fares/PSH method, I get fare results from multiple airlines - and in fact it seems to be exactly the same results as if I enter '**'. Meanwhile, all other airline codes (that I've tried) correctly restrict the results to just that airline.
It seems this is happening on a variety of routes that I've tried. Can't remember if it worked correctly before (but I think it did...)