What's worse than sitting through Ben Affleck's yuletide ''comedy,'' Surviving Christmas? His hokey red-and-green eyesore of a reindeer sweater. Apparently, nothing says holiday-movie fun like kitschy knits: Tim Allen and Jamie Lee Curtis don their garish apparel in Christmas With the Kranks, while Renée Zellweger and Colin Firth unite for another tacky-sweater moment in Bridget Jones: The Edge of Reason. ''It's not the height of good taste,'' says Bridget director Beeban Kidron of the his-and-her snowman sweaters. ''It's a good laugh.''