It only seems to happen on this site and none of the other forums I frequent, so it's something specific to the way things have been setup here. Almost as if the forum software is optimized for a certain resolution, but the black background image with the vertical Vaping Underground text is of a substantially higher resolution. I really have no idea, of course, but if I had to take an absolute shot in the dark that's probably where I'd start poking around first.
Not even sure why the black background image is even necessary, actually, since visually speaking we just want to have the forum frame in view. There really isn't an instance I can think of where we need or want to see that background image, so perhaps removing it altogether might be the solution. Kinda above my pay grade though. Lol