Imported pdfs drop images when exported to pdf from InDesign

[ArkArt]

I produce a small newspaper in InDesignCS. I often place advertiser pdfs into my InDesignCS document and export the finished document to pdf and send to my web press printer. I have done this for a couple of years and have not had any problem.

Recently, certain pdfs I have placed into my document drop their images when I export the file to pdf. I've gone into the problem pdfs and found that they were created with Quark 6.1 & Quark 6.5. The only difference I could find between them and the pdfs that export correctly is that the problem pdfs have a custom property called: Xpress Private which is found in Document Properties in Acrobat.

Could this custom property cause images to drop or have I unwittingly set some preference in InDesign. If it is a problem with custom property, is their some way to workaround this problem? Has anyone else faced this issue?

Any input would be gratefully received.
JC

 

[Lessa]

Indesign PDFs have sometimes caused problems for me and I've found that reverting to my old ways has solved the problem - print a postscript file and run it through Acrobat Distiller. I use ID's pdfs for proofs, but don't trust it for the final version, so I distill it.

 

[ArkArt]

Thanks.

JC