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  • 2 weeks later...

Same here.

Back again for me.. so strange sometimes its there and sometimes its not. As if the graphic driver is not loaded fully at the login screen sometimes, hope Apple fixes it, it is quite annoying.

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It happened frequently with the GM build, haven't seen it after updating to v10.8.1.

My 2010 with "high-end" video card does struggle more with graphical effects than it did under OS X Lion. Personally I think it's ludicrous Aqua was coded in a way it requires so much processing power.

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It happened frequently with the GM build, haven't seen it after updating to v10.8.1.

My 2010 with "high-end" video card does struggle more with graphical effects than it did under OS X Lion. Personally I think it's ludicrous Aqua was coded in a way it requires so much processing power.

Do you have the auto brightness turned on your Mac? I think thats the culprit to this issue... when my screen brightness change slightly I noticed a quick flicker on my screen when using my iMac (not the login screen). Although the login screen when turning on will flicker very badly for a while (which isn't much of an issue i spend what like 3 seconds on the login screen)

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