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I just noticed this on facebook. My GPU is a AMD 7970 with the latest drivers in photoshop.

Are those black blocks a sign of a bad GPU, driver problem, or firefox being stupid?

Here is the picture:

enter image description here

Ignore the white blocks, I did that to censor out my friends names.

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So the white blocks are added by you, the black ones are added by firefox? – Frank Sep 2 '13 at 4:41
1  
Another (but unlikely) option is that FB is causing it. Do you only notice the problem in FB chat? – Dennis Sep 2 '13 at 4:43
    
Can you try another browser? Chrome? Even IE? How about trying to turn off hardware video acceleration in Firefox's advanced options? – Bob Sep 2 '13 at 5:10
    
I will try a different browser, yes I added the white blocks, and i just noticed it in tumblr aswell – shadedpixel Sep 2 '13 at 5:56
2  
Try removing the hardware acceleration in Firefox. I'm also not sure what Photoshop has to do with this (Firefox, Options, Advanced, General, under the browser section turn off Use hardware acceleration when available)? – Dave Sep 2 '13 at 7:31

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