I happen to agree with Steven, and feel that you all were too harsh on him for having a sensible opinion. I think it's a shame that Canon can charge $500 more than the D800 and expect a simple tape job to make everyone happy. It's a flaw in the design of the camera, period. I would be bummed grabbing my 5D3 and thinking about a tape job fix inside the camera every time I did a shoot. It's more about principal and not about functionality. How would you feel if you bought a Lexus with a headlight issue and they fixed it with tape and assured you that you it is as good as new and will never give you a problem? Most would say that as long as Lexus would honor any problems then they would be good with it, but you also would drive around every single day thinking about that stupid tape.
The D800 is hardly without flaws. The list of current complaints include:
1) Oil spots on the sensor
2) Fine scratches on the mirror
3) Soft focusing on the left side of the frame with certain lenses while the right side of the frame is tack sharp
4) Weird green tint on the LCD screen
Are any of these serious issue? Nope, but they'd annoy me a heck of a lot more than a light leak that won't actually affect any of my photos. Interestingly, the Nikon guys seem to be good sports about this, and there isn't nearly the same amount of whining as there is on CR.