Earlier this year another study (Marcott et al) was released that apparently shows the unprecedentedness of the rate of temperature change of the 20th century compared to the last 11 millenia. Note that what is not in dispute is that current temperatures are not unprecedented!!!
However, as it turns out that the unprecedentedness is a completely spurious artifact of the analysis and/or tricks that the study authors performed. Some are even calling for the paper to be withdrawn and the authors disciplined for misconduct.
Steve M. @ ClimateAudit.org started the critique of the study...