I am using Mint 10 GNOME 64 bit.
I have Firefox 3.6 and Chrome 9 web browsers installed.
My problem is that Flash in Firefox is not working with Youtube and it shows a grey screen in the place where the video should be, but Flash is working fine with other video sites like Daily Motion and Metacafe and with Adobe's Flash player test.
Also Youtube works fine in Chrome.
I didn't find the right solution from the Internet.