I've recently set up a new website www.futurefive.org. I was viewing it on my iMac (OSX 10.7.5) and it was showing one of those placeholder pages (generic woman smiling, URL in a green bar at the top, with nonsense search items down the left). After the DNS resolved, the URL takes you to the website on every computer and iPhone EXCEPT this iMac. Still takes you to that placeholder page (see attachment). I've tried running the Terminal command sudo killall -HUP mDNSResponder, but it doesn't change anything. Anyone have any ideas?