One thing that drives me batty is the date helper window's complete lack of intelligence. Select an outbound flight for six months hence, then go to select the date for your return and you have to click through all six months. Obviously my return flight is going to be after my outbound flight.

Another problem I've had intermittently is the date helper window coming up in Spanish, even though the pages are served in English and I've never even attempted to view a page in Spanish.

Let's see if I can remember my homework from 35 years ago in Junior High....Lunes, Martes....