not really a big deal but i was wondering why CO would do this. I had a $250US voucher but was paying the excess in Cdn funds, so i had to go to the airport to purchase the ticket. The total was $19.53 CAD and i signed the amex bill (and yes i got all amex bonuses ) just recently i saw on my statement that they credited me back this amount, only to charge me $20.30-odd cents. Like i said-not life threatening situation, but i was kindof curious to why CO would do this and would they think that they'd sneak this by me? anyone else this happened to ??