Was it this story? I put "Michael Moore" Cuba State Department in a search and got this story immediately. Wow!
WikiLeaks cables: Michael Moore film Sicko was 'not banned' in CubaFilm-maker says diplomats made up the story to discredit film that showed healthcare was worse in US than Cuba
David Batty guardian.co.uk, Saturday 18 December 2010 15.26 GMT
American diplomats made up a story that Cuba banned Michael Moore's 2007 documentary, Sicko, in an attempt to discredit the film which painted an unflattering picture of the US healthcare system, the film-maker said today.
A confidential US embassy cable released by WikiLeaks claimed that Castro's government banned the Oscar-nominated film because it painted such a "mythically" favourable picture of Cuba's healthcare system that the authorities feared it could lead to a "popular backlash".
But Moore said that far from being supressed by Havana, the film – which attempted to discredit the US healthcare system by highlighting what it claimed was the excellence of the Cuban system – was shown on national television.
The film-maker said on his blog that the diplomatic cable, dated 31 January 2008, was "a stunning look at the Orwellian nature of how bureaucrats for the state spin their lies and try to recreate reality (I assume to placate their bosses and tell them what they want to hear)".
More:
http://www.guardian.co.uk/world/2010/dec/18/wikileaks-us-diplomats-story-cuba-banned-sicko-filmOn edit, I finally got your link, after restarting my computer. The problem was with me, not your link. Sorry!