Checks if the document has been compressed using the PDF Optimizer feature in Adobe Acrobat 6.x or later versions.
Compressing the document structure information (including tags, accessibility features and tagged PDF information) results in a smaller file size. However, this can cause version compatibility problems. A PDF file with document structure compression can be opened and printed in Adobe Acrobat 5.0, but any structure information will not be visible in Adobe Acrobat 5.0. Only Adobe Acrobat 6.x and later versions can use compressed structure information as if it were uncompressed.
Remove object compression.