Don't you hate it when this happens...

... when a company releases two DVDs of a certain movie (widescreen and full screen) and you accidentally buy the full screen because you didn't bother to check the box? That happened recently to a friend, but he didn't care, because he really doesn't understand the difference between full and widescreen. But it was annoying as hell to me when I watched the movie with him!!

Has this happened to anyone?