Hi, as you can check in this page (please open in Chrome for Windows or Edge):
http://www.presentazioni.eu/
The frame in the top right (Anteprima video gratuita) has a lot of blank space in the bottom (after "Invia l'anteprima gratuita).
If you open the same page in Chrome for Mac or other browsers everything is ok.
The linked content is this:
http://www.presentazioni.eu/index2014iframe.php
If you check this page in Chrome for Windows there are no blank space, so I think it is added by the plugin.
Last thing, everything is ok if you check the page in mobile or other responsive resolution, but not in the "standard" view.
Thank you for your help, I'm becoming mad!!
Alessandro