Marc Hauser is a Harvard psychologist, one of the best known experimental psychologists practicing today, with a remarkable publication record. Trouble is, some of his data was fake. Scuttlebutt is that his grad students finally had enough and forced the university to act. Good for them.
LessWrong people may be interested in Hauser since most "Trolley problem" experimental research you have seen here has his signature on it. Hauser's humiliation has led to humorous handwringing from bloggers who know him and poorly disguised glee from bloggers who don't like him
Is there any reason to be worried about his work other than the fairly subjective coding of animal and infant behavior? Yes, I would expect that to correlate with fraud in other experiments, but I would also expect fraud in experiments like this one to be easily detected in the actual investigation, and that doesn't seem to have happened.
http://www.pnas.org/content/107/15/6753.full
http://news.bbc.co.uk/2/hi/health/8593748.stm
http://news.ycombinator.com/item?id=2007859