Rick over at Farecompare has just written an article on how he proves if the airlines drop the ticket price and if you have purchased a higher priced one you can get a refund, and in some cases a $100 E-Certificate.. Ok in fairness I have known about this for a while, I have used their Airline Ticket Email Alerts for some time now. The Airline Ticket article goes on to show what Rick did.

quote from article :

These tickets had to go down in price later that same day with the ultimate goal of making a refund claim; documenting each airlines claims process, warts and all; and include copies of the original tickets, refunded tickets, and all claims correspondence.
it’s been dugg here

DaveN