AP does not include black overprint in PDF export

[pgraficzny 24]

Preflight at the printers warns that the PDF does not overprint black even though the option "Overprint black" was selected when exporting. I don't have Acrobat, so I can't check it. Attached is a sample source file, exported pdf and export settings screen. Please check and confirm. If confirmed, report an error.

Link Dropbox for source file https://www.dropbox.com/s/fgz70g1y6mmxom3/Test_DLx3.afpub?dl=0

Link Dropbox for PDF file https://www.dropbox.com/s/qfrjiizopxj3fkg/Test_DLx3.pdf?dl=0

I apologize for my English - Google translate.

 

 

[Lagarto 187]

Yes, it does overprint the black text. This is a screenshot from Adobe Acrobat Pro, black plate turned off (overprinting simulated):

...and this is a screenshot when the pdf has been opened in Photoshop in CMYK mode, black channel hidden:

 

[pgraficzny 24]

Thats great! Thank you very much! The files have probably been replaced somewhere.

Indeed, my old version of PS CS6  is great for testing PDF files - it includes a PostScript interpreter. Thank you for your answer