I was fine with FC14-32, but the only way I've managed to start JACK is by having Ardour do it rather than jackd:
Cannot connect to server socket err = No such file or directory Cannot connect to server socket jack server is not running or cannot be started).
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A well-known problem with a goofy solution that I hope I won't need for too much longer.
Not much if any news in this, Nonetheless I'll be interested in what people might have to say...