Yet another programmer is in a tussle with yet another cable TV system operator. New York-based Cablevision Systems ( CVC ) filed suit Friday against Time Warner's ( TWX ) cable TV operation, saying that Time Warner Cable -- the nation's second-largest operator of cable TV systems -- was unfairly trying to change the terms of the agreement under which Cablevision's AMC movie channel runs on Time Warner systems. The lawsuit calls Time Warner's move to terminate the current terms "an attempt to alter the affiliation agreement unilaterally, in bad faith, to impose much lower prices" for AMC. The AMC lawsuit -- which seeks $250 million in damages -- alleges that Time Warner has attempted to terminate the contract on the basis of material changes in "the general quantity and quality" of programming on AMC. Such changes haven't occurred, says AMC.