Actually I would like to correct something I said. I erroneously said that this should not happen. But in actuality this very common among any brand/model of camera. I think you mentioned that the true colour of the wall was some variant of white. If you look at the two pictures you posted, Anthony, the 60D shows a pink cast and the 50D displays and yellow cast.
This is caused by the artificial lighting and every camera will behave similarly but will sometimes cast a different colour as we can see between the 50D and 60D. Even the white areas of the mask are affected although the effect is much more subtle because of the size of the white beads on the eye lids.
This is easily corrected in post processing which I've demonstrated at this link:
http://www.clubsnap.com/forums/showpost.php?p=6651973&postcount=816