tangor - 8:10 am on Jun 29, 2009 (gmt 0)

they still see the anti-link image and not the real image (until they hit reload). Any suggestions?

How would they see the same image? Arriving via browser to your site should cause the browser to read everything "new"! Unless I'm missing something, you'll be serving the real image to your site visitors, not the anti-hotlink image...