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I probably should figure this out on my own, but what is the recommended PM Preferences for Aperture 3? I noticed that Aperture 3 is not in the PM Help Workflow section.This is from the Aperture 3 Help:More Information About IPTC MetadataIn Aperture, you can import and export IPTC metadata for an image in an XMP sidecar file. XMP sidecar files are XML files that accompany each image containing IPTC and other metadata associated with the image. Any field containing information in the IPTC Core metadata view for a selected image version can be exported to the XMP sidecar file for that version. The IPTC Core metadata view is compliant with the IPTC Core specification version 1.0.