I have the following iframe:

<iframe width="370" height="300" frameborder="0" type="text/html" url="http://www.youtube.com/embed/4p0DsVPkyZg" name="video"></iframe>

at the page:

http://www.learnintouch.com/elearnin.../subscription/

But it is empty on Firefox 11.0 and on Chromium 18.0

The same problem occurs with a Vimeo url.

Any idea ?

Thanks

Stephane