title: IE7 not Caching CSS Image over SSL
body: <p>I'm using the <a href="http://projects.nikhilk.net/WebDevHelper" rel="nofollow noreferrer">WebDevHelper</a> toolbar for Internet Explorer to troubleshoot HTTP requests/roundtrips on my <strong>SSL</strong> site and noticed that IE re-downloads my CSS :hover images <strong>every</strong> time they are triggered. This causes a huge amount of roundtrips.</p>
  <p>How can I prevent this from happening?</p>
  <p><strong>Edit:</strong>  All static content is served with <em>cache-control: public</em>, so images, javascript etc. are cached in Firefox and Chrome. This problem is IE specific.</p>