Just got back from RGS and the topic of old 590MA actually came up in our war stories....
Apparently 590 was the one plagued with "automatic flap deployment". Yup. Cruising along at 17,000 and 210 KIAS and all of the sudden you get that lifting feeling as the flaps choose to deploy to 35, the config horn sounding all the while. Happened to one of my other former captains and tended to be a recurring problem for a while. Sure has a way of building a reputation, anyway.