have there been any reports of any rips, tears, or leaks due to this cosmetic problem? if not, this is something that is just part of the top folding in on itself. imho it is not something to be concerned about; until the top's fabric fails. my top has the same crease, to me its not a big deal. the marks are on both sides of the top too from folding in on itself and no one seems to have a problem with that being the case.