Using both 2014R3 and 2014R2.1 on a Mac, this happens with Verdana, Helvetica and Arial on Firefox. It’s worse with Verdana, cutting off several pixels like your example. But with Helvetica and Arial it only cuts off one, maybe two pixels.
Chrome and IE (in Windows VM) look fine in all cases. With either no style or System or Lucida Grande it looks fine on all browsers. Must be why I haven’t caught it before, as I usually use either no specified font or Lucida Grande.