Updated Unbuntu 11.10 to 12.04 LTS, and am very glad to find that the Flash player settings dialog unclickable problem solved. Before Ubuntu 12.04, each time I connected to a site with flash apps, such as Youtube "Record video from webcam", that want to access the the webcam or microphone, the Adobe Flash Player Settings dialog freezes, allow/deny buttons are unclickable. I tried to find a solution for that, but gave up at last , because all those suggestions seemed to be useless. I have faith in Ubuntu, I thought to myself, this problem will be solved at the next release. I am sure of that. ^_*
Lost in the Digital Land, Leaves behind Footprints on the Sands of Time.