If the warming data was manipulated and falsified, then any study that looks for causation of the falsified warming data, is invalid.
Thank you for noting what should be an obvious truth but seems missing from most, if not all, of the reports I've read about this study. Although it is an obvious hit on the Global Warming Nutcases I'm still a bit of a skeptic for the reason you gave as well as the whole CFC connection. I would like to read the study but haven't been able to find a free copy of the PDF yet. One would think that it would be all over the place by now. If anybody has a link please post it.