One of the confidential US embassy cables revealed by WikiLeaks reports that Cuba banned Michael Moore's 2007 documentary, Sicko: "...the memo reveals that when the film was shown to a group of Cuban doctors, some became so "disturbed at the blatant misrepresentation of healthcare in Cuba that they left the room".
Castro's government apparently went on to ban the film because, the leaked cable claims, it "knows the film is a myth and does not want to risk a popular backlash by showing to Cubans facilities that are clearly not available to the vast majority of them."
Read more at The Guardian.
UPDATE: Michael Moore response, and my comment, via it's all one thing