I haven't installed a modchip on my Wii, and I am kind of glad I waited. I just started noticing graphic glitches on certain areas of the screen. Happens when I am on the channel menu, or in any of the channels. I haven't tried a game yet, but I will a little later. The glitches look like the glitches you get when you try to overclock a PC video card too much. Kind of hard to describe. Have any of you guys had this problem? Might have to call Nintendo and use the warranty.