I am getting weird black PDF files when I Save As Translated to a PDF file. I think I have isolated the problem to the following:
1) The drawing has colored text in the background title block
2) The drawing has dimensioned sketch geometry
3) The PDF options are set to save as color (see below)
Can anyone reproduce this? See attached draft file.
in the meantime You can change the dimension color from Autocad Black/White to Black (or whatever color You want).
Doing so You can print Your drafts to PDF without any problem.
And as mentioned by Dave, it will be fixed with MP4