Originally Posted by janek
If Adobe Acrobat opens it, it is either valid PDF or a miracle. And thank you for your preaching, I'll try to implement it in my further life.
That is big bullshit. There are tons and tons of PDFs out there, which are not standard as defined by the respective ISO norm. And yet, Acrobat and other software is able to open those PDFs.
The fact that a certain piece of (proprietary) software is able to do something you want, does not make it by default a standard norm.
Apart from that, you at least tried to fix the PDF by, e.g., running it through Ghostscript and fixing it thereby?
EDIT: Oh, also: Adobe != PDF standard. Get your facts straight.