So I made some noob characters and did some digging:
Neither human males nor females are affected by the size-differential bug.
Neither barbarian males nor females are affected.
Neither woodelf males nor females are affected.
Both halfling males and halfling females are affected.
Both halfelf males and females are affected. However, I did notice that I seemed larger than most male 1/2-elves, though shorter than one 1/2-elf.
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Perhaps we should call them 5/8-elves now? Disseller can be a 3/4-elf. In all of this, I have noticed that my halfelf and halfling noobs are, in my view, the same size as halfelf and halfling vendors.
I do not know what other races are affected, though at present I still think the graphic draw bug is rooted in the way that the game stores information to display racial height.