large geojson dataset mapped using geojquery, in chrome, but weirdly enough, not in IE9 the overlay doesn't quite keep up with the map when it pans.
Modified http://code.jquerygeo.com/jquery.geo-1.0a4.min.js to a secure url
https://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js
https://code.jquerygeo.com/jquery.geo-1.0a4.min.js