I just updated from openSUSE 11.4 to 12.1. I started my profile from scratch this time, though I restored firefox, thunderbird, pidgin, and a few other setting folders. After the upgrade, firefox will not play youtube videos. I get a black rectangle, with no video, no play button, or anything else. Am I missing something I need to add? I would think if it were not there at all, I'd get a screen that says I need to install a plugin (flash video, IIRC), but I'm not even getting that. Just the black rectangle.

Thank you in advance for your help.