Here are a few links about the discussion on maroon clowns:
http://reefcentral.com/forums/showth...+female+change
http://knol.google.com/k/forming-pai...-in-clownfish#
http://reefcentral.com/forums/showth...ale+sex+change
I guess they never say that a female maroon won't change back into a male, but that they will probably kill themself trying to show she is the more dominant fish. Bottom line, if you have a larger maroon, try to find a very small one to pair with it and have a container to keep the small fish in until the larger fish accepts them.