Both Trader Joe’s and Skippy had salmonella problems, and a recall:
http://www.foodsafetynews.com/2012/12/salmonella-and-peanut-butter-victims-stories/#.UfVAeEvwZmU
&
http://www.suntimes.com/news/metro/4199722-418/salmonella-warning-prompts-skippy-peanut-butter-recall.html
Oh, gee—thanks!