Faulkner estate sues over the line in a Woody Allen film, “The past is not dead! Actually, it's not even past. You know who said that? Faulkner. And he was right. And I met him, too. I ran into him at a dinner party.” (I would have taken this as a parodic reference to Allen's own persona, myself.) The quote itself reads: “The past is never dead. It’s not even past.” The story says this is a copyright complaint, but quotes an assertion of confusion; the complaint itself claims both copyright infringement and a violation of the Lanham Act (along with something called "commercial appropriation"), but I'm torn as to which claim is more fee-worthy for defendants.
ETA: here's the complaint until RECAP goes live. Faulkner Literary Rights, LLC v. Sony Pictures.