Text ("B" "C") turns yellow with certain tactical graphic symbols (Chemical Containment Area: GFMPNC--------X; Biological Containment Area symbol: GFMPNB--------X) when UseAffiliation is set to true.
Something else must be going on within the sample application.This is not reproducible at 10sp1.The outline of the poygon (defining the chemical or biological area) is rendered in the affiliation color, the text remains black.