I think it's just SDL apps, maybe, but a lot of the full screen windows I'm opening right now are showing up zoomed in 2x, and not centered, such that I'm seeing the upper-left quarter of the buffer at double size. I noticed it in dosbox initially, and pygame does it too. Torchlight doesn't. dosbox and pygame use SDL 1.2 and Torchlight uses SDL 2, I'm not sure if that's relevant but it's a difference.