Single photon sample cross-section

I am using the RooUnfold package, Bayesian iteration method. I've run the old pi0 result through this method as well, and I get a result completely consistent with my old chi^2 fit based one. 

There is still some issue as to how I deal with the first bin, but it should be reasonable at this point. Errors are the ones calculated by the package. 

EDIT: THE FOLLOWING PLOT IS NOT CORRECT. REFER TO MORE RECENT PAGES FOR CORRECTED RESULT