On the "Export Adobe PDF" dialog, on the "Marks and Bleeds" tab, does anyone know what the "Type" drop-down is? The only option in that is "Default" and changing other things on the dialog doesn't seem to affect it.
Unless you want to create your own custom marks, leave it alone.
For more info, see http://indesignsecrets.com/creating-custom-printer-marks-in-indesign.php.
It has not changed since CS3.
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