Yes, Firefox here also. Heres the thing, if you keep your browser open so that you have a scroll bar on the bottom, once you scroll to the right, you have that write empty place. If I pull the browser open to fit across my screen and there is no scroll bar then there is no problem, the banner displays entirely. Is that the way it is supposed to be?
Honestly I am not sure now when first happened, know I REALLY noticed it last night on this banner.
I have no add blockers or Java blockers that I know of.