I recently discovered the following potential problem. I'm working with raw files (NEF), running PM 4.4.3.3 on Windows XP.
I have the PM preferences set to "always create and/or update XMP sidecar file..." After ingesting, I add keywords, rate the better images, and then type 'E' to send a selected image to the defaul editor (Photoshop Elements 5, in this case). In PSE, I set the ACR settings. Instead of opening the file, I click on "Update" (shown when holding Alt key). Using a text editor, I can verify that (a) PM create XMP sidecar files as expected; and (b) PSE wrote the ACR settings to that sidecar file, without affecting any of the other information (keywords, PM ratings...etc.). So far, so good.
However, if I make any further changes to the IPTC info for the image (e.g. change the Urgency Field so iView can see the ratings), PM appears to re-write the sidecar file and wipes out the ACR settings.
Is this the expected behavior and, if so, can it be improved?
Thanks, as always,
Kevin
PS. PSE stores ACR settings in an undocumented database, rather than offering the option of writing to a sidecar file (like PS CS2). However, I found that if a sidecar file already exists, PSE will read and write ACR settings to the sidecar. This is the main reason why I set up PM to create/update sidecar files in the first place: to force PSE to write the ACR settings in them.