Change in US baggage rules
CO has changed the rules and there is an extra charge for an additional bag (upto $50) per bag wef sometime mid september 2009. I am assuming other US airlines are also changing this rule. Also a thing to note. Previous allowance used to be 2 bags of 32 kg weight limit. NEw allowance is 23 kg weight limit. There are also some extra charges for oversize, and over wieght first and second bags. Best to go their site and review
Not sure what routes these are applicable to but definately experienced it on DEL - EWR