This article claims that everything was a lie. Even the hockeystick agreed with the stuff that they are claiming has now been proven inaccurate. Temperatures were cooler from the 40's to the 70's. No one disputes this. Why are they disputing it now?
The data I found more interesting was the correlation between sunspots and temperature.
This article doesn't do a very good job of rebutting the movie.
It is amazing how effective it is to say "you're wrong" when it is coming from the "other" side, but when we say "you're wrong" we are deemed biased.
The difference I think lies in our interest to be correct. When someone tells us that we are wrong, we immediately go back and look at our data and try to present the data properly. When they are wrong, they stick to their guns and blaze through it. Conviction is often more important that truth.