The director of “I Am A Sex Addict,” winner of the IFP Gotham Award last year for Best Film Not Playing at a Theater Near You, has been caught in the crossfire of a day-and-date distribution battle between Mark Cuban, the film’s distributor IFC Films, and cable system Comcast. Filmmaker Caveh Zahedi wrote yesterday on his indieWIRE-hosted blog that Mark Cuban had ordered his Landmark Theaters circuit (the country’s largest for arthouse and independent films) to cancel this Friday’s debut booking of the film in Berkeley, CA. Cuban has decided to …