Problem Sprite Flickering with WebGL enabled and ATI Mobility Radeon HD5470

I’m experencing an issue with COCOS2d-html5. If the browser, both Chrome and Firefox has webgl enabled, the sprites and the backgrounds in the game flicker. Every sprite is divided in 2 triangles, one colored and another black, even the background and almost nothing is recognizable.
My Video card is ATI Mobility Radeon HD5470.
Tryed using a lower FPS but nothing.
Only disable the Webgl in the browser can help but then I’ve no possibility to use Textures2D.

It is so strange bug. We have not met it before.

Could you please paste the image here? I can’t image the problem.

What is your OS? Please help to show me the the OS version and chrome version.

I’m sorry for digging this up. This is a deadly issue when using a ATI Radeon Display card with cocos2d-x. There must be something wrong with FBO when display card is ATI. Please check this issue again.
The textures are black and some times crash. CCRenderTexture is not working as well.