For the past few days, I have been having trouble playing embedded YouTube videos in some sites that I regularly visit on my Safari browser. It always shows up as a blank black box with the controls at the bottom missing and the play button in the middle and the title link not working. Clearing the cookies appears to have solved the problem but only temporarily. I tried uninstalling/reinstalling Flash but to no avail. Is there a permanent solution other than having to manually clear cookies all the time?