Vimeo - Embed not working in IE

Question

I've developed a page for a client and something really weird is happening: http://cpdlectures.com/IStructE/Default.aspx

This Vimeo video works inside of Chrome, Mozilla etc. But it doesn't work in IE.

I initially thought it might be scripting error or something, so:

1. I hit F12 to open my developer tools,
2. Click Script,
3. Refresh page to watch the JS code execution,
4. Video works!

close Developer tools, video still works after refresh. Close the browser, reopen, broken again, refresh without opening developer tools, still broken.

What? Are Microsoft implementing the Observer effect into their browsers now?

How can this be?

Answer 1

In my case, the problem was updating the Flash!

See the print with Vimeo above and Youtube below (WinXP - IE8). Before and after upload.

Before:

After: