Artifact when switching to full screen mode on youtube

This problem looks exactly like this youtube video:

http://www.youtube.com/watch?v=zL6QEGOuhgA

(I'm not the owner of the video clip, I could capture mine but It seems not necessary)

I was able to make it happens on

- 3 different machines (new fresh-installed Windows)

- 3 different browsers (Internet explorer, Firefox and chrome: all latest versions up to days)

Here is how to make it happens

* Go to any youtube video clips

* Click Play

* Within the first 2 seconds after the clip started to play, Click on full screen mode

-- The video will artifact until the end if you don't quit full screen mode, switch back will make everything back to normal

-- It won't happen if replaying the clip.

Updated:

- After disabled "Hardware Acceleration" in flash, the problem is gone.