This is a difficult thing to search for since 'line' means a number of things within the scope of InDesign and PDF.
I'm talking about the small black line down the middle of each spread, and sometimes (I don't know why) outlining the entire page. Sure, I can cover them up with white lines in the master pages, but is there some way of keeping them from ever exporting?
I'm using CS4. Crop marks are turned on; PDF export follows the document's 0.125-inch bleed settings. I'm exporting to Acrobat 5 by default.