HTML 5 Black Screen?

Thought I'd add one more problem to the pile. ;)

Today, every time I try to play HTML 5 videos, I get audio but the picture is all black.

I'm using Windows 7 and Chrome.

Anyone heard my cries for help?

Progressive sucks. The streaming won't load well even though I have a great connection.

The HTML 5 has always worked really well for me, but now it is fucked because of the no picture.

Watching Premium Content is almost impossible.

What version of Chrome are you using? Also are you using AdBlock or any other extensions?