I had been mulling over the choice between the D800 and the 5D3, and went with the 5D3 for a number of reasons - one of which being the fact that I like the Canon ‘design’ altogether more than Nikon’s. And then this light leak issue creeps up (which I confirmed just now on my 5D3). I’ve been hearing people saying things liked “it doesn’t matter in real-world shooting”, or “it’s easy to avoid it by just not lighting the LCD in dark environments. 1. This just isn’t true - if light is leaking in and altering the metering, you get (slightly) altered photos. This has been confirmed by many. And 2. whether most of us shoot in really dark environments or not simply doesn’t matter. We shouldn’t have to take precautionary measures when shooting photos to work around a design flaw. We as customers should not be the solution to a product’s design problem. And no matter how easy the solution is, it doesn’t change the fact that it’s a design flaw.
I remember watching The Tonight Show many years ago and during one of Jay Leno’s monologues, he said, “In other news, the FDA came out with new rules regarding fecal matter in poultry. Now folks.......this is the new rule? Shouldn’t this have been the old rule? Shouldn’t this have been rule #1??”
(....Of course, he went on to say “I sure hope this doesn’t mean Colonel Sanders is now down to only ten secret herbs and spices in his fried chicken”....but that’s beside the point.)
Similarly, a camera properly blocking out light should be rule #1. A camera is supposed to block out light....just in case we decide to shoot in extremely low light environments (which many already do). And for a fairly-dim LCD backlight to alter the metering in a dark environment is just plain scandalous. That kind of thing suggests that Canon pushed this camera out before testing it thoroughly (or maybe they knew about it and decided to ship it out anyway and hope for the best).
Either way, I’m returning mine, and will consider buying it again after Canon has satisfactorily addressed the matter. Shipping a brand-new camera back to Canon to have it modified or repaired is completely unacceptable, and utterly out of the question.