chrome fullscreen playing youtube html5 is dimming my screen

[Fernando Miguel]

 chrome fullscreen playing youtube html5 is dimming my screen...

video example:
https://www.youtube.com/watch?v=U6qLpEFfJhQ

Google Chrome 17.0.942.0 (Official Build 110446) dev
OS Linux
WebKit 535.8 (@100508)
JavaScript V8 3.7.7
Flash 11.1 r102
User Agent Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/535.8 (KHTML, like Gecko) Chrome/17.0.942.0 Safari/535.8
Command Line /opt/google/chrome/google-chrome --flag-switches-begin --enable-print-preview --flag-switches-end
Executable Path /opt/google/chrome/google-chrome

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: gnome-power-manager 3.2.1-1
ProcVersionSignature: Ubuntu 3.2.0-1.3-generic 3.2.0-rc2
Uname: Linux 3.2.0-1-generic x86_64
ApportVersion: 1.90-0ubuntu1
Architecture: amd64
Date: Sat Nov 26 10:32:36 2011
SourcePackage: gnome-power-manager
UpgradeStatus: No upgrade log present (probably fresh install)