Illustrator Adding Weird Lines to Logo on Dark Backgrounds (Not Stroke)

I have a logo symbol that has several intersecting lines. In Adobe Illustrator (CS6), slight gray lines are being added at the intersection points.

I haven’t noticed it in other artwork, it only seems to appear on black (dark) backgrounds. There is no stroke.

Any idea what this is?

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To me it looks like you have “Divided” the shapes with pathfinder and you need to “Unite” them with pathfinder again (the top left icon in the pathfinder window). Ctrl-Click the shapes with the same colour (or go to select > same > fill & stroke) and click “Unite” in the pathfinder window.

(If you can’t see the pathfinder window go to window > Pathfinder)

Source : Link , Question Author : Trent Scott , Answer Author : Frank Conway

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