Three years after Minnesota’s St. Olaf College, operator of the oldest listener-supported radio station in the US, sold its classical broadcast operation to public radio behemoth Minnesota Public Radio (which promptly converted it to a pop music format,) the school is still feeling the wrath of longtime supporters who claim that the sale was illegal. Now, a lawsuit has been filed, and a judge may rule that WCAL-FM (now KCMP) was a charitable trust that the college had no right to sell without consulting its trustees.