Yeah, thing is, I didn't touch enlarge person. It apparently -is- affected by the size change code. I'm not intricately familiar with the PRC subsystems, but it appears that all the enlarge/reduce person code does is set a local int that is then processed by something else to actually make the size changes. I wasn't able to find the guts of the draconic enlargement feats to see how they implement size changes, so I can't say for certain what needs to change, or how, in order to make this stable.