The big news this week is the recently published paper in Nature of the new size of the proton. Using a muonic hydrogen atom (a hydrogen atom where the electron has been replaced by a muon), a new Lamb shift measurement has produced a result of the size of a proton from 0.877 fm to 0.8418 fm.
Big deal, you say. But the implication of this can be quite astounding. The previous measurement was done based on the Lamb shift of a regular hydrogen atom. So the discrepancy (taking into account that the muon is heavier than the electron, etc.) may have a more profound effect, such as either the calculation is at fault, or that there may be a problem with QED itself.
There certainly could be hints of new physics here.
 R. Pohl et al., Nature v.466, p.213 (2010)