The good folks at Slate let me go long on Kenneth Lonergan's Margaret, whose much-anticipated extended cut arrives today as a DVD bundled with the Amazon-exclusive Blu-ray of the theatrical cut. (As to why it's a standard-def edition available only through a single outlet, see the tortured history of the film's theatrical release.) The piece is long enough without me blathering on here as well, so suffice it to say that in spite of some technical rough spots, the three-hour Margaret turns an already great movie into a wounded masterpiece. When you're done, return here for an equally patchy recording of last night's post-screening Q&A, with Lonergan, Mark Ruffalo, Matthew Broderick, Jeannie Berlin and J. Smith-Cameron. (Not seen: Editor Thelma Schoonmaker, who from her seat in the house told moderator Tony Kusher to "move on.")