Incorrect PNG Colouring (Swapped channels?)

Please can someone take a look开发者_StackOverflow at the following image: http://img109.imageshack.us/img109/6885/colouring.png

I need to make the bottom image the same as the first. It appears the colour channels are wrong, but I'm not sure and can't correct it.

Please can someone tell me how to go from the bottom image to the top image?

Thanks.

EDIT: Thank you, swapping the red and blue channels fixed it!

My guess is that you've swapped red and blue. Perhaps a byte ordering problem?