That is one of the "hate" points also. Old OM cameras worked with up to 9 (yes, nine) T32 flashes in TTL mode almost thirty years ago until dSLRs replaced them. Now, one single lousy flash only. I have actually discussed that with some photogs on another forum. Amazing how many of them are so narrow minded and could not see any use of multiple flashes in TTL and couldn't imagine the advantages the old OM2n had in that respect. Maybe they could just not admit that their precisious E-1 they had paid loads of money for would not be as good as an old OM2n from the 1980's in any respect. Well, I love the FL-50 which I am a lucky owner of, but similar solution to the T32 flash(es) integration into OM2n still has to be invented and built by some camera manufacturer. My next brand will be the one that implements that in an inlelligent way in a dSLR, if the camera has an optical view finder also.Won't work together if in TTL mode though.
Why do they not work together in TTL mode? Weird. Olympus pray tell us!