So I need some help. Whenever I play any game using ZSNES, if the screen scrolls either sideways or up and down, I get flickering horizonal lines on the screen. It's almost like the game is stuttering in just a specific few lines. It also varies in placement...the lines can be anywhere on the screen but they are always horizontal.
I'm using Windows Vista, but I also experienced this problem on XP.
Without getting overly technical(I must be sick or something), it's caused by the screen changing while the computer is still drawing it. Turning on VSync will force it to wait for the next new screen.