I also just checked my reference files set and found the line in the vanilla files, and the diplomacy version even has an additional square box as the SECOND character in the line
diplomacy 1.011 file
OldParticleAffectThreshold 0.000000
AffectAttachedParticles TRUE
numAttachedEmitters 2
attachedEmitterName "?�??????????????????????"
attachedEmitterName "flames"
WidthInflateRate -10.000000
HeightInflateRate 130.000000
vanilla 1.191 file
OldParticleAffectThreshold 0.000000
AffectAttachedParticles TRUE
numAttachedEmitters 2
attachedEmitterName "???????????????????????"
attachedEmitterName "flames"
WidthInflateRate -10.000000
HeightInflateRate 130.000000
and entrenchment did not have a copy of the file.
harpo