Try illogical. Explain to me how the OP managed to damage the sides of the RAM slot if the RAM was properly sized? I'll await your "eloquent" explanation. Oh, that's right, he made it all up. And the reason for that is? I'll await the possible reason someone would do that then, if that's the theory. And the other people who said it's "a real tight fit", but they managed to get it in? So how is it the Crucial RAM is tight from China and the United States RAM seems to be even tighter, to the point it wouldn't go in? Oh yeah, I'm delusional as well. Has it occurred to the skeptics that are so suspicious of multiple Crucial RAM buyers with fit problems and specifically the United States version, that it might be out of spec? I received a nice follow up email from a Crucial rep today talking about the Apple specs being finicky and he will continue to look into it. Perhaps these slots are slightly different and Hynix was given a size to make that is slightly narrower than industry standards for this RAM? I don't know, but that is one possible explanation I suppose.
I do know there are a bunch of skeptics on here that would rather denigrate people that are trying to help by sharing their experience than to actually provide some meaningful addition to the thread.
Also, the OP claimed the locating "key" or "tab" was damaged by the module's notch being too narrow. Not the sides of the slot.
So some inconsistency here. Which is out of spec?? The notch or the sides of the module?