As many have said, our quilts are labors of love and the more detailed the quilt the more intense the labor that went into it and the more the person is loved. If it stands out like a sore thumb and is visible to everyone then I would want someone to pull me aside and point it out but if it is just a little flaw that is barely noticeble then I most likely already know it is there and left it on purpose. Use your judgement at the time whether you tell me or not.