Currently Being ModeratedAug 6, 2012 9:18 AM (in response to xiaoyanfromirvine)
It's your FlashPlayer plugin. Go to Adobe's website and use their uninstaller first, then install the current version of FlashPlayer.
Currently Being ModeratedSep 11, 2012 8:08 AM (in response to hpr3)
I have just unistalled Flash - reinstalled from Adobe website and made sure the security setting on Safari was correct (enable plug-ins). Still get "blocked plug-in."
Currently Being ModeratedMar 17, 2013 4:10 AM (in response to demetriofromsan diego)
Make sure you restart your computer. I had the same issue, and after I restarted the computer this process worked.