khanacademy.org broken under FF4 + NoScript

[whatwhat]

I'm trying to view videos at khanacademy.org, but they don't load. If I right-click on the area they're supposed to appear in, I do get the Flash context menu. I've tried:

* allowing all scripts on the page
* updating to the latest nightly of NoScript

but only disabling NoScript seems to work.

Browser/system info:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:2.0b8pre) Gecko/20101121 Firefox/4.0b8pre ID:20101121030816

[Giorgio Maone]

There's a known issue with videos, NoScript and latest trunk.
I'm working to fix it, thanks.