I have created a series of print ads in InDesign CS5.5 to be run in magazines, and at the bottom of the page is the company's logo, with a drop shadow applied to it within InDesign. Nothing strange there. Upon exporting the PDF, I use the Press Quality settings which by default are made to create 300 dpi PDFs. The only changes I make in the settings is adding bleed and crop marks, I don't change anything that could affect the resolution or transparency settings. But still, the magazine's print-technician always replies that the shadows in my document have a low resolution.
Up until now I have told him to not worry and run it anyway, and the results have been fine - I haven't noticed any problems with the quality of the print in the magazine. But it really annoys me that I keep getting these error messages - I want to create perfect PDFs! Why on earth are my shadows ending up as low resolution images?
The only thing I can imagine might be a sign of an issue is under the Advanced-tab in my Export-settings. The Transparency Flattener section (which I, to be honest, am not quite sure what it is) is set to medium resolution, and is greyed out - meaning I can't change it to high resolution. Could this be what is causing it? And if so, how do I fix it?
