Hello! Thank you for a very useful plugin! Except that upgrading from version 1.1 to version 1.3 broke my site. After upgrading, my site went "white", nothing would display. I had to remove the plugin completely. I tried re-installing version 1.3 and before the screen went "white", I got a message that was something to the effect of, "this plugin has an invalid header". I deleted version 1.3 again and then I went back to version 1.1 and everything works again.