Racism? or not

http://www.reuters.com/article/domesticNews/idUSTRE51I61D20090219
I just love it when Al Sharpton or Jessie Jackson or anyone else starts yelling racism without thinking. After all, it just points out that they are nothing but racists themselves.
In the above article, they are complaining because an editorial cartoon that makes fun of President Obama by comparing him to a chimpanzee.
Where was Sharpton when President Bush was compared to as a chimpanzee (http://www.bushorchimp.com/)? Did he complain then? So why complain now?