I searched for the best recent M+ VISA thread to post this in and this is the best I found.

I know it is slightly OT but this is very important info about how DCC (Dynamic Currency Conversion) could end up costing you an extra 6 cents for every dollar charged overseas.

I posted it in the VISA/MC forum as I thought is was most appropriate there but I wanted to give all my UA FTers (especially those of you lucky enough to travel overseas on company's time/dime) a special heads up ...

http://www.flyertalk.com/forum/showthread.php?t=458036