I downloaded http://download.macromedia.com/pub/labs/flashplayer10/flashplayer10_2_p3_64bit_linux_111710.tar.gz and put libflashplayer.so in ~/.mozilla/plugins/ and the black squares are gone.
I downloaded http:// download. macromedia. com/pub/ labs/flashplaye r10/flashplayer 10_2_p3_ 64bit_linux_ 111710. tar.gz and put libflashplayer.so in ~/.mozilla/plugins/ and the black squares are gone.