Does anyone read this to suggest that older raw (nef) files that were converted with earlier versions of the software should be (or may benefit from) reprocessing with this latest version?
In general, I wouldn't worry too much about "re-processing" older DNGs with the most recent DNG Converter if you are also using Camera Raw 6.2 (or LR 3.2) but for earlier version of Camera Raw but after 4.7, there may be a benefit because the current profiles will be installed to update older profiles.