I ran validate_drp's examples/runCfhtQuickTest.sh several times to compare a branch to master where I expected no change. I was surprised to find a change in PA1, PA2 and PF1 (though everything else was identical) so I ran a twice more, once on the branch and once on master. Each run gave different results. For example:

PA1 : 10.10 mmag <  5.00 mmag == False

PF1 : 12.00 %    < 10.00 %    == False

vs.

PA1 : 10.35 mmag <  5.00 mmag == False

PF1 :  4.00 %    < 10.00 %    == True

for the two runs using master.