I have a few video components that cause the video to roll when switched through the 1070. One is the OSD of my VCR. It connects through video 1's composite input. The other is one of those video game joysticks, the awesome commodore 64 joystick (it's an actual commodore64 rom, stuffed into a joystick! a hackers paradise!). My monitor is a 42" plasma, connected to the monitor out component outputs.
Has anyone noticed any video components causing their screen to roll? I assume this means the vertical sync is off a bit, but I'm not much of a video expert.