Thanks, I know the LR-PS workflow perfectly well, though there's been no change for a number of cycles in the need to keep LR and PS versions in sync if you want to re-edit smart objects. The original post was about ACR/PS and I was responding to the posts quoted below, and since CS2 you've been able to "go back to ACR to make further edits" to a raw file in a smart object.
Quote from: dmerger on January 13, 2013, 05:20:03 PM
From ACR, open your photo in PS as a Smart Object. From PS, you can then easily go back to ACR to make further edits, then back to PS again.
Quote from: stamper on Today at 03:19:54 AM
Provided you are using PS CS6 and not an earlier version.