This sounds suspiciously like hibernation caused your graphics subsystem to change modes or report false information through certain APIs. Firstly, have you tried exiting Octopus on both machines and relaunching it? If that doesn't do it, have you tried rebooting your PC(s) yet? You might have stumbled onto a problem with A) your machine, B) your graphics driver/card or C) a hibernate issue with Octopus. I sincerely doubt the latter as Octopus doesn't do anything special with graphics modes directly (far as I know anyway).