The killing that I proposed cured a good fraction of the Ks bug, as it can be seen comparing http://www.slac.stanford.edu/~rfaccini//phys/vub/ksFix/-comp.html with http://www.slac.stanford.edu/~rfaccini//phys/vub/comp_1010/phot7trk7-comp.html Tehre is still a residual effect that might be due to the fact that I got the killing factor from a small statistics. I will provide the factors on higher statistics, but I have committed the correction used in these plots so that people can start playing around if they want ciao ric