PDF not printed Properly

I have been trying different settings to print some drawings, both vector and raster output, resolutions down to 72, but the output is patchy. See attached image. Is it a resolution/ram problem or a bug in 7SR14? because I have just updated.

Have you tried both pdf printers (rhino pdf and windows pdf)?
Video drivers are updated?
Is this happening only with big files (plenty of curves) or with small files too?

Hello - it is hard to know what I am looking for in the print. Can you send a file to tech@mcneel.com, with a link back here in your comments?