Comment 3 for bug 1095958

Yes, definitely sounds similar, especially the linked thread: "Only the upper left quarter of the DOS screen is visible, magnified to double height and width so as to fill the whole screen." - that's exactly what I was seeing.
Though if it is the same, the title should be updated, since it's not about fullscreen windows, only the resolution change. (The desktop looks wrong even without any fullscreen windows.)