I learned earlier this week that American, Delta and United airlines shrunk the maximum size for carry-on luggage to 22 inches long, 14 inches wide and 9 inches high. According to my measuring tape, I will need to buy a new carry-on before the next flight I take. (When the airlines started charging for the first checked bag, I have refrained from checking luggage, limiting myself to a carry-on.)
This revelation about carry-on size came just a few days after United announced that it will be updating its MileagePlus program so that award miles are accrued based on ticket price rather than miles flown. American may follow suit.