Upgrade from Nero 7 to Nero 12 Burning Rom UFD/ISO error

We have upgraded to Nero 12 Burning Rom on a Win 7 workstation; from Nero 7 on an XP workstation. We burn UFD/ISO data DVDs with the ISO "9660 only" setting. Currently using the Nero 12 Burning Rom a secondary check software from our QC department is throwing up an error. "UDF check for primary volume descriptor failed." With this error we have to fail our products at the internal quality control level. We did not have this issue with Nero 7. Is it possible that Nero 12 is writing the PVD in a different sector of the disk that Nero 7? If so is there any documentation for this?
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