Dunno. I think I always cut them out myself, which is mosty because of the Hair a Pain in the Ass. Sometimes I'm using a Feather of 1 Pixel, which helps a little Bit, but you'll have to overwork some Edges again, depends on the Background the Character has. Hate it if you want to use a Person that is on a white Background and you want to put it into a dark Signature.
Using the Blur Tool also helps.
Anyway, cutting out the Guild Wars Character was way harder than the Guy in his Armour Suit Thingy.
"Who is it doing this synthetic type of alpha beta psychedelic funkin'?"