I bought a bicycle light set (front and rear) a few years ago. They work fine (in fact, I still use the headlight; the rear still works, but it was replaced by a radar light), and I wrote a review. More recently, I was looking back through my purchases, and I came across the review I'd written, but the lights they were now selling on that page were a completely different design than the ones I had.

I edited my review to note that the current lights didn't match the ones I had, not that it'll do any good with a million other reviews of those lights. I know Amazon doesn't really care, but I very often see "There is a newer version of this item available here" links, so I'm surprised that this was possible.