Some of you may remember me reporting some funny graphical glitches in my Wii a few months ago, which cleared themselves up overnight. Well I finally picked up Mario Galaxy today, pop it in my Wii, start playing, and lo and behold, there arestrange lines and blocks all over the screen. Sometimes they're harder to see than other times, but they're always there. I'd almost call them artifacts, like in a JPG, only scattered randomly about the screen as opposed to being clustered around objects. They're blocks and lines of discolored pixels, mostly red and green from what I can see, and they're never really in the same place all the time.
EDIT: Also clusters of darkly colored pixels, mostly in vertical lines, and very noticeable on the green of the grass.
EDIT2: Also they show up en masse on bright white scenes, such as when you first talk to Rosalina.
Does this sound familiar to anyone? A product of the GPU overheating, maybe?