Thank you for the patch. Which validator are you referring to?I tried PDF/A a while back and noticed the XMP header has an extra byte order mark which validators flagged as “??”.I’ve attached the patch I used to remove it, however I’m still on an old version of ConTeXt so this might not apply cleanly to yours.You might need to open the patch in a hex editor to see the difference in the two lines as most text editors will not show the BOM.--Leo