I just had to update my currency converter widget on my Mac since it wasn't working. And after I did, It was 641 pesos to the dollar. I brought it back up and it was 610.95. Xe.com has it at 611.217. I think my computer was trying to play an early april fool's joke on me. I don't think it would have ranked in the all time jokes.
Top 100 april fool's jokes...
http://www.museumofhoaxes.com/hoax/aprilfool/



