[Plugin: Post Video] Broken in IE and Firefox works in Chrome

I have successfully installed the plugin, and tried it on three different browsers. Mac (Chrome and firefox) only chrome works and actually will play the slideshow. Firefox will show a box with an x in the middle of it. I have the lastest versin of firefox installed on my macbook pro. On my windows XP laptop, I tried it on (firefox, IE7, firefox, and Chrome) It does not work with IE and gives an error message, does the same thing on the pc as the mac in firefox, and works in Chrome…

There must be something wrong with the coding for it to only work in Chrome