Albert,
I have an HP1050cm and a HP 4000, listen to this: I have had problems
since day one printing my layout that contains pdfs, tiff, bmps and STUFF
......i moved the project to AC11 and 'EUREKA'..all problems with printing went away.
MACBKPro /32GiG / 240SSD
AC V6 to V18 - RVT V11 to V16