Black pixels on certain colours

One some images, as I increase the resolution, black pixels appear. When the image fits the screen, I can't see anything but as I increase the resolution, these black pixels become very obvious, but only on certain colours, like the blue of this dress.
Help !!! What's going on ?
Anyone know ?
CS5

Looks like a known problem with some AMD/ATI graphics card drivers: pixels with red=0 are displayed black. As far as I know, the very recent Catalyst 13.2 beta 5 is good.
http://support.amd.com/us/kbarticles/Pages/AMDCatalyst132BetaDriver.aspx

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Sorry there's no consistency in crop but why am I seeing these strange black pixels and why do they disappear when saved as jpeg or same photo viewed in different viewing software? Please help.
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A bug in AMD/ATI graphics driver. Update to Catalyst 13.2 beta 5. See thread: Black pixels on certain colours

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jocstone_me wrote:
Hi everyone,
is there a way to find out where a certain colour (swatch) is used inside a document, like on what page or something?
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Black pixels on certain colours

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