I have noticed in Firefox for PC version 3.0.5 that I can go to a cute editor page and it shows up but when I hit the backspace (previous page) button, all I get is the cute editor window clearing. If I hit it the second time, it really does go back to the previous page. Yes this happens on the demo page on your site as well ...

 

This seems to be a Firefox problem; I do not get the same results with IE 7, Safari for PC or Chrome.