rapid_snail (933090) writes "Steve McIntyre, who operates the site climateaudit.org found some anomalies in the US temperature data used for climate modeling.
The problem was found to be a Y2K bug. NASA has confirmed this and published the corrected data on its website. Years of bad data has been corrected; 1998 is no longer the warmest year on record. In fact, 5 of the 10 warmest years on record now all occur before World War II. More info here" Link to Original Source