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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?

enter image description here

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Is this a screenshot of Illustrator or an exported file? – JohnB Jan 8 '13 at 0:10
up vote 3 down vote accepted

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)

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That was it! Thanks so much, would have never figured that out. – Trent Scott Jan 8 '13 at 3:31
You don't really need to re-unite the shapes except for your own reassurance: these lines are just artefacts in Illustrator's preview and will not show up in any export. They might show up in a *.pdf, but will not show when that *.pdf is printed. – Vincent Jan 8 '13 at 14:04
Yeah I was thinking of adding that fact - I should have really haha. – Frank Conway Jan 8 '13 at 15:05

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