I usually change my desktop resollution to 1280x720, then play fullscreen (with F11) to record videos. Just tried to do so with 14w17a and when I hit F11 it changes resolution to 1920x1080 (My native desktop resollution). So now I can't play fullscreen at 1280x720 to record. :-/ A nice fullscreen resolution option would fix this bug and also give all youtubers something that would help us inmensely.