I just bought a 24 inch aluminium iMac last friday. Once I brought it home, one of the first test I did with it was the pixel test to find if there is any dead pixels. I used an application named Pixel Check. There doesn't seem to be any dead pixels except for dust particles trapped under the glass on the top right hand corner of the screen (near the spotlight icon). It's not even noticeable unless you really inspect carefully when using pixel check. Now the question is: What should I do ? Should I take it back to the apple store and get it replaced ?