<p>HiDPI browsers probably support the new picture element (in the future <a href="http://caniuse.com/#search=picture">http://caniuse.com/#search=picture</a>). So the (few) img with png in it could be replaced by the following construct:</p>
<pre><code><picture>
<source src="/assets/osm_logo-xxx.svg">
<img alt="OpenStreetMap Logo" class="logo" src="/assets/osm_logo-xxx.png"/>
<p>OpenStreetMap Logo</p>
</picture>
</code></pre>
<p>But the logo seems to be the only img tag on the site.</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/850#issuecomment-65446147">view it on GitHub</a>.<img alt="" height="1" src="https://github.com/notifications/beacon/ABWnLU77WzbyqcBxTa8WkmZz8cPKLlGDks5nTzjpgaJpZM4DDsQl.gif" width="1" /></p>
<div itemscope itemtype="http://schema.org/EmailMessage">
<div itemprop="action" itemscope itemtype="http://schema.org/ViewAction">
<link itemprop="url" href="https://github.com/openstreetmap/openstreetmap-website/issues/850#issuecomment-65446147"></link>
<meta itemprop="name" content="View Issue"></meta>
</div>
<meta itemprop="description" content="View this Issue on GitHub"></meta>
</div>