Originally posted by jeremy_c The EXIF information should be intact, you can easily see it was indeed +1EV.
Indeed, but I can also see from the EXIF that this was shot using spot metering. And perhaps the spot was on an area with light text. It's just too hard to tell from that one sample ifthere is 8actually* a problem here. All I can say is that at first glance, it's strange enough to be worth investigating further. But if you're going to do so - and I think you should - it's important to understand how to do so properly, so other variables (like spot metering here) don't throw off the results.
Quote: I do know that *any* shot I take with the 18-55 is very dark.
It is indeed possible your lens or camera is defective. but if you're looking for validation of this claim, you really to post some well-controlled test results. Shoot at something *other* than maximum aperture so you're not simply seeing the effect of over-optimistic maximum aperture, use center-weighted metering or multi-segment metering on a subject that has a very clear range of "correct" values (eg, not one with bright highlights or high contrast or anything like that).
As it is, I simply don't see any reason not to assume user error. And I don't mean anything personal by this: I would say exactly the same to anyone who presented with the same evidence you have. It's just not very conclusive. Maybe there's a problem, maybe not - it's impossible to tell for sure based on what you've posted thus far.