For all of you intrepid BigBlueButton users out there, here is some help. You may have noticed in recent Flash upgrades (perhaps associated with Ubuntu 11.10 or Mac OSX Lion), you can no longer click on the flash dialogues that appear in BBB. This makes it impossible to acknowledge requests to use you mic or camera.
There is a thread developing on the user forum to address this. Have a look: http://groups.google.com/group/bigbluebutton-users/browse_thread/thread/ab4020fab726d2a7/6c89d89aaea60371?lnk=gst&q=flash#6c89d89aaea60371