Is There Any More Research Out There on Fox and the Facts?

On Wednesday I did a post that I knew would draw a lot of comment, listing five studies showing that people who watch Fox News are more likely to be misinformed about an array of issues--the Iraq War, global warming, health care, the Ground Zero mosque, and the 2010 election. This research was all out there in the ether; I just pulled it together. To this synthesis, there were many replies--but none of the comments that I've seen have pointed out that my rundown of studies was incomplete in some way. I find this kind of surprising. One of the studies I cited was from 2003; all the rest were from the last year or so. It would be odd if nothing were lying in between. This post, then, is just to ask again whether anyone has come across other research pertinent to this subject--Fox, and the facts. If so, post it in the comments.