Well,
I try to write the metadata only with Photo Mechanic, and soon they are extracted with different catalog software: Expression Media, AtomicView, etc…(
and waiting the Photo Mechanic Database...
) If I need to make a change, I do with Photo Mechanic and relaunch the database: the catalog software never touch the metadata.
My Preferences in PhotoMechanic are (for RAW files) to write IPTC, IPTC4XMP and Sidecar.
Thinking about the future… Can arise some problem maintaining so many metadata? (since I have already commented, I only publish metadata with Photo Mechanic)
thanks!
Jose.