Factual error: The site identified as the Rocky Flats nuke weapons plant, NW of Denver, is not Rocky Flats.
Factual error: Moore states when talking about Canada that "13% of the country is non-white, so the Canadians are pretty much like us". He uses that figure while trying to figure why the deaths caused with guns is so high in the US compared to other countries. Problem is the US, as of the last census (2000), was nearly 25% "Non-White". Now 13 and 25 percent don't seem that far away but not only is the US percentage almost double Canada's "non-White" population, but that 25% equates to over 70 million people in the US - over two times the entire population of Canada (which as of their last census was 32 million).
Continuity mistake: The speech that Moore claims/shows then NRA president Charlton Heston giving in Colorado is actually several speeches edited into one. Note how Heston's clothing changes between cuts during this speech.
Factual error: After the shooting of Kayla Rolland at Mt. Morris, MI, just north of Flint, Michael Moore says "Just as he did after the Columbine shooting, [NRA President] Charlton Heston showed up in Flint, to have a big pro-gun rally" When in fact Heston's speech was given at a "get out the vote" rally in Flint, which was held when elections rolled by some eight months after the shooting (Feb 29 vs Oct 17) In fact, then-presidential candidate George W. Bush, then Vice-President Al Gore, civil rights leader Jesse Jackson, and Moore himself all spoke at the rally.
Continuity mistake: After interviewing Charlton Heston and as he is leaving Heston's property, Michael Moore tries to show him the picture of a little girl that was killed by her 6 year old classmate. Heston walks away but Moore keeps shouting back to him. The scene keeps jumping back and forth between a wide shot behind Moore looking into Heston's yard, an a very close up shot of Moore as he is yelling with the picture to show Heston. Moore claims both angles were taken simultaneously with two cameras. However, neither camera is visible in the shots. This is impossible. In the wide shots, there is no place that the close up camera could have been hidden. Due to the plants, etc. obstructing the view, the close up camera had to be a few feet in front of Moore at most and thus would have been visible in the side angle shots.