Last week, I had a file sent in jpg, and pdf.
It was a paint roller with a swath of paint blending from navy blue to green to red.
In Reader, the pdf looked fine.
In CorelDRAW, only the Navy was visible.
Fortuanety, it was a digital job, so the jpg was sufficient, but, as I said, some of these pdf's created in Illy, do not open properly in CorelDRAW. I assume that it was a layer issue.
I'm glad for the Moose man that X6 and Homer were able to help on this one.