Were CO2 Levels in the 1940s Actually Higher Than Today's?

In this bipolar (Hannity and Colmes) interview, controversial climate scientist Tim Ball makes reference to a "soon-to-be-released" study that will contradict the IPCC's model of CO2 driven catastrophic anthropogenic global warming (CAGW).

I wonder if the study that Ball alludes to is the same one discussed at An Englishman's Castle and Greenie Watch? If anyone has more information on this story, I would appreciate a "heads-up."

If the CO2 levels used by the IPCC climate models are wrong, then the entire climate change house of cards collapses. It is difficult to believe that an established political body as well-funded and supposedly reputable as the IPCC would falsify data. But it is vital to keep in mind that the IPCC is a political rather than a scientific body. Political groups are in the business of falsifying data, in order to acquire more influence.

Update: Roger Pielke Sr. reveals some of the inner working of the IPCC from his own experience as an IPCC scientific participant in 1995.

Update: I should explain that I am referring to disagreements about the validity of ice core air bubble CO2 levels used by the IPCC as opposed to historical measurement of atmospheric levels of CO2 by reputable scientists in the 19th and 20th centuries. The IPCC models are based upon a very low "pre-industrial" level of atmospheric CO2--based on ice core measurements. The question is whether the IPCC "ignored" valid data that contradicted the model of anthropogenic logarithmic rise in CO2 levels over the past century. If so, results of climate models would not be valid.