In troubleshooting an unrelated problem today for a client, I noticed that IE8 was throwing a Javascript error on my site for the /video-js/video.js file:
'video' is undefined, Line 121, Char 365
I found that if I remove the comment tag at the very end of the video.js file (which reads "//@ sourceMappingURL=video.js.map") the error disappeared.
http://wordpress.org/plugins/video-embed-thumbnail-generator/
