Videos only in Safari + Youtube appers like a black box
Hello,
I use Safari 5.0.3 on a White Macbook with Snow Leopard and a Intel GMA 950 graphic card. Youtube always go fine, since yesterday. Now, when you go to youtube to wath a video, you can only see a black box. You can not click it, or right click it, nothing happens. But you can watch videos of youtube when they are embedded on a web page, or the flash videos are from other webs.
With firefox and chrome youtube go fine. I had flash 10.1, and installed 10.2 but all is the same. The very strange thing, is that if I use Safari in 32 bits, the youtube videos go fine, or if using Safari 5.0.3 whith the menu developer I use another user agent, for example Safari 5.0.3 windows, I can watch the videos.
But I want my default configuration, with Safari 5.0.3 64 bits.
Can you helpe me, please? I'm visiting forums all around internet, and nobody knowns a solution, and I see that they are many people with this problem.
Ah, excuse me for my english, I'm from Spain, and it costs me very much to write in english, but I understand very well. Another thing, my work is computer engineer, and I known about this type of problems, and I tried reinstalll, look for virus, repair permissions... all that you can imagine, but nothing.
I wish you can find where is the problem. Thank you.
Sergio