I'm curious to ask those insistent that falling is an implicit part of flying without a fly speed: should we just deem powers that explicity state "if you don't land, you fall" as simply engaging in unnecessary exposition?
I would say that the powers that don't explicitly state "if you don't land, you fall" are lacking in that respect rather than the other way around. IOW, I think the end errata for this power will be "Add the following sentence to the end of this power: If the target does not land at the end of this movement, it crashes."
I agree that under your interpretation of Fly, the power is broken. But I do not think that is the right interpretation and also disagree with CustServ's interpretation. If WotC had intended for this power to grant long-term flight they would have said "Fly Speed" as they have done in every other case where the flight is long-term (meaning encounter-length or longer)
I'm interested in hearing your responses to the points that Cadfan and I have made since you were a strong advocate that this power is broken.