In my workflow I preview all new images with PM, select the 'keepers' and rate them using the star system. I ran into problems transferring those ratings to my image management software (IMatch) with some older JPG files. After looking at these files with a hex editor I found out that they contain two (2) XMP segments, each beginning with an APP1 marker. PM adds the rating, tags, etc. to the second XMP block, whereas IMatch checks only the first XMP segment it encounters.
My newer images (starting about 2007?) contain only one (1) XMP segment, so the synchronization with IMatch is not a problem.
So there are two querstions:
1. Did PM change the way embedding rating, tags, etc. and other XMP data or did the camera manufacturer (Pentax) do that? I seem to recall a camera software update some time ago.
2. Can I somehow use PM to correct the older files or do I need to fiddle with 'exiftool' to transfer the PM XMP data to the first XMP segment?
Alf