<p>I can confirm this problem. But this looks very much like this issue: <a href="https://github.com/Leaflet/Leaflet/issues/1115" class="issue-link" title="Polylines and polygons incorrectly positioned in Android Opera Mobile">Leaflet/Leaflet#1115</a>, which suggests that its probably a bug of Opera Mobile.</p>

            <p style="font-size:small;-webkit-text-size-adjust:none;color:#666;">
              —<br>
              Reply to this email directly or <a href='https://github.com/openstreetmap/openstreetmap-website/issues/170#issuecomment-12491805'>view it on GitHub</a>.
            </p>
            <img src='https://github.com/notifications/beacon/uTRSc6ihLa7Shf84BpiOpmLWAu4oQih75mggZl1E8_n4noWNHRueRIbNFWw4Z_c7.gif' height='1' width='1'>