Hi Kirk, fantastic fast reply, thanks!!!
It was not a problem with permissions, but it seems that if you untic the box to allow writing into RAW files, the settings in the IPTC/XMP tab are changed, so when you tic the box again the begaviour is changed.
I solved both problems by editing the IPTC/XMP tab, so now ratings etc are exchanged just fine between PM and Bride/ACR, AND I managed to maintain reading old ratings (internal IPTC).
The only thing not working now is that on old images with internal rating only stored, the rating is lost when I edit a raw file, since that creates a XMP sidecar file. Is that something possible to solve by some smart logics? Like "If star rating is empty in sidecar file, then have a look in the embedded IPTC/XMP fields"....
Bridge seems to write into a sidecar file when rating and editing RAW files.
My old ratings are stored as embedded IPTC.
My new settings now, to make PM work with Bridge/ACR:
1. Read XMP sidecar file
2. Read embedded IPTC
3. Read embedded XMP
Add embedded IPTC
Add embedded IPTC4XMP
Always create/update XMP sidecar....
Rgds
Petter