Had this same thing happened to me during my three-wheel endorsement class -- embarassing and very inconvenient! The class had a mechanic available, and he disconnected the cable from the bracket. Parking brake worked fine after that. Must have released enough tension from the cable to unlock it. He had also heard about issues with the '18 parking brake, thought it was a solenoid issue. I had the bike in to the dealer (Lifestyles, in Mount Vernon, WA) for other reasons this past week, and they fixed it, although in the rush to pick it up at closing time, I forgot to ask them what the problem was. Anyway, not an unusual issue with newer Spyders, apparently.