I'm having an issue with an InDesign CS3 file which is printing too dark and I can't figure out what the problem is. I'm a little out of my element and would greatly appreciate any advice. The document is a photo-based advertisement and it's coming out dark and muddy. It's printing through an HP Designjet 130, but I don't suspect the printer as the problem because I ran a calibration and when we print another ad it comes out perfect - identical to a copy which was printed professionally. The file looks fine on several computers/monitors, but always prints dark and muddy. I've played with as many settings as I could think of - stuff like relative and perceptual colorimetric colors, but when I deviate from the settings we always use, it only looks worse. In fact, we always print with the same print settings, color and paper profiles, and the same paper, so the only thing which seems to be different is this file itself. I'm out of ideas and would really appreciate any advice you might have.