Wrestling with Scribd’s fullscreen display

I’ve been using the document-sharing service Scribd to embed documents in posts for various projects. but sometimes the “fullscreen” feature doesn’t work with the embedded document. I’m trying to troubleshoot this. So as a test I’m embedded a Scribd document here, to see if fullscreen works:

1 5 2010 Concurrent Meeting of the Oakland Redevelopment Agency City Council 10-01-05 Meeting Agenda

…OK, just viewed this post in Firefox for Mac and the fullscreen function does work here. But on another site I publish on, which is a complex Drupal site, it’s not working.

Have other Scribd users experienced similar display problems when embedding documents on Drupal sites? Got any solutions?