I'm not entirely sure if this is Corel's problem or Acrobat's and maybe someone could share some light on the matter.

Here's the problem:

In many cases, when publishing to PDF, Black is exported as full CMYK (100C100M100Y100K). I receive multiple reports on that from the prepress bureau I work with and I have to manually separate the colors and print them to PDF instead of publishing them with Corel's built-in system which is a lot faster and convenient than Adobe's printing routine.

Can anyone confirm who's to blame here, Adobe or Corel? If it's a Corel's issue, then maybe there is any sort of solution?

Ah, and also, sometimes there are spot colors in the published PDF which are absent in the actual CDR document. What the...?

 This needs to be looked at please send a sample CorelDRAW file to davidmilisock@comcast.net.

OK, David. I have quite a large workflow and it's hard to trace back the documents with the abovementioned problem, but as soon as the next incident occurs I'll send the file to you.

I send everyday PDF files from CorelDRAW to Mac programs, and never have this problems.it's not a CorelDRAW problem, perhaps the reason is your settings

CMYK rich black is one of the color swatches on the Default CYMK color palette. could it be accidentally selected?