At New Scientist, an updated list of Thirteen Things that Don't Make Sense.
There is a rather large class of odd experimental results floating around out there. Most scientists assume that most of them are flukes of one sort or another, i.e., some kind of problem with the equipment or some sort of unusual situation in the lab. But some of them could really point toward new phenomena.
One of the thirteen items in the list is Cold Fusion. Hundreds of scientists have tried to duplicate the original experiment, and enough of them have obtained energy outputs of one level or another than the Department of Energy has recently said it would start accepting proposals for Cold Fusion experiments within its usual physics of energy programs.