Nicolas,
I heared that animated Gifs are not rendered when redirections are started.
One side effect with my YOO template is that my page stops to rendered in browsers (IE9, Firefox). The display stops after your code, and I don't see my page modules and footer !
1) If I refresh the page, I see the footer,
2) If I Show Source in the browser, the footer IS HERE,
3) If I Inspect the page with Firefox Firebug, the code stops after Hikashop and there's no footer.
A very skilled developper told me that most browser stops rendering when there's a redirection (Paypal).
Could it be possible to differ of one or two seconds, the Paypal Redirection to finish page render ???
Regards.