I have encountered a rather annoying bug for Rakshasa involving the Drow form. If I transform into a Drow it defaults to the darkest skin color. If I then transform into another form, it will have that Drow skin color. This applies to any transformed race except for Elf.
For instance, if I transform into a Drow or a Dwarf, I'll have charcoal skin. The same goes for humans, gnomes, etc. Now, if I change the skin color with an NPC after changing into a Drow, that new selected skin tone will apply to those other races (sometimes), but not when I return to Drow form, as it'll default to the charcoal skin color again.