What you've got there is called "snipe". Now what you've got to do is go snipe hunting... ah nevermind! ;-)
Snipe just means that the blades dig a little deeper right at the end of the cut - which can be a problem for jointers or planers. On a jointer, the first thing I would check would be the level of the outfeed table. You might try raising it just a hair to see if the snipe gets better. If so, keep raising it about 4 atoms at a time and making test cuts until the snipe goes away. Keep in mind that if you raise it too far (ie, above the level of the knives), then the wood will bump into it -- that's too far!
I'll bet that will fix the problem, but if it doesn't you may have other problems (such as the infeed/outfeed beds being out of parallel).