My 5D MIII has a blowen pixel as well center right. Only shows up around iso 1600 and up. I've heard people say that most chips have them and that its a sad fact of life- I don't know.
You know my 7D has the same thing, only ever saw it in the 7D's video.
I work with a Sony XDCAM-HD (I know CCD Not CMOS But). We get blown pixels a lot all you do is Black balance three times in a row and the camera basically masks the bad pixels out. I guess for stills you can just brush it out but in video its a big pain.
Am I sending my new camera back too?