TOPIC: FPDF error: Unable to find xref table

Hi, the full error I'm seeing when clients buy some pdf files is. To be mentioned that I don't see it on all files.
FPDF error: Unable to find xref table - Maybe a Problem with 'auto_detect_line_endings'
I'm using Version 2.5.11, Order #496
Can you please help with this?
Thank you

Dear mnemos,

Please re-save the pdf file in another compression. "PDF reduced size", A-PDF seem to work fine. If you want you can forward me the problematic file and I will save it in a proper format. Problem comes from a glitch in the PDF framework.

Thanks!

Hi, Thank you for a quick reply.
I'm using Adobe Acrobat X Pro
I've tried a few formats, and the only compatibility setting for those pdfs that seems to work properly is Adobe Acrobat 4.0.
Problem is this compatibility setting creates HUGE files...
This is not happening to all pdf files tough, only on some older pdfs, no idea what was used to create them in the first place...