Not exactly a mistake, but I recently heard Johnny Cash's version of One, by U2.

I was stymied by the fact that he sang the line: "We *get* to carry each other", whereas I was sure that U2 sang: "We've *got* to carry each other" - a very different proposition, and much more likely from their puritan Irish background!

Doing a quick Google on it, I find that all American sites with the lyrics give them as "we get to carry each other" - that is, "we are allowed to carry, have the privilege of carrying, each other", whereas all Irish sites give "we've got to carry each other" - that is, "we are under an obligation to, we must, carry each other". Hmmm.