If you look at the serif on the right-hand leg of the 'R' in the sample and compare it to if you type in 'R' under the "Try Font" tab, it seems like the latter serif is truncated.
Similarly, the serif for 'R' here is truncated (go to 'Character Set'):
But not here (have to go to 'Character Map'):
Does anyone know why this is? It is confusing to me since these sites are all owned by Monotype Imaging.