I just received a replacement iMac as the original one had a couple of what seemed to be dead pixels, and some dust under the glass in a couple of spots. Well after switching it on and starting to transfer my files, the first thing I see is a large speck of dust under the glass which is even more annoying than what I had on the original screen. I haven't done a full pixel test yet, but if it turns out to be just this one speck of dust under the glass, is there anything that I can do to dislodge it myself, or is this one also going to have to be returned? I mean there is no way I am prepared to live with it. What I do not understand is how these are being allowed to ship in this state? I mean you don't even have to turn the thing on to see this speck! Has anyone else had repeated problems with this, and how many times have you/will they let you/send them back? It is such a hassle I think I only have one more in me before I give up. Which will be ridiculous as I love everything about the computer itself. Any thoughts?