The top most button on my button-up shirt shows through my V-Neck sweaters. They're not like crazy fitted or anything, and regardless of if I unbutton the second button from the top (depends on my mood :)) the third button from the top seem to stick out. I only even noticed because people pointed it out to me. In fact, more than just one person noticed it.
What I've been doing is imply unbuttoning that third-from-top button so the placket covers it. That seem to solve the problem.
But is this a problem that anyone else has noticed? And if not, well, do you notice it now that I just made you aware?