Derik at Joyride and Jim Grahm FOCF brought this to my attention.

On January 19, 2009, we announced a voluntary recall of 14 U.S and 4
Canadian products including CLIF Bar, CLIF Builder's, CLIF MOJO, CLIF
Kid Organic ZBaR and LUNA Bar, in the U.S. and Canada because the
peanut butter in those products was sourced, for a limited period of
time, from the Peanut Corporation of America (PCA). PCA is a
manufacturer and supplier of peanut butter for many food companies and
manufacturers.

PCA is under investigation by the U.S. Food and Drug Administration
for a recent Salmonella outbreak thought to be caused by tainted
peanut butter. In light of this investigation, and with an abundance
of caution, Clif Bar & Company has enacted a voluntary recall. We take
the health and safety of our consumers very seriously.

More info:http://www.clifbar.com/voluntary-recall/