Call me weird, but I just love things that don't make sense.
I tried "Create collections from directories". I had nothing to lose, since I'd already used "Delete all collections". So I know I didn't have any problem with duplicate file names.
Ring of Fire, no.
ring of fire, sure, no problem.
rename ring of fire to Ring of Fire, nope. no way.
rename ring of fire to ring of Fire? Sure thing.
rename ring of Fire to Ring of fire? absolutely!
rename Ring of fire to Ring of Fire? can't make me do it.
C'mon, guys. It's not that bad of a name, is it?