A bunch of shots were replaced from non-DVNR sources when making the master for the '95 THX "Faces" release from that of the '93 Definitive Collection (DC).
Most of these replacements were to correct split-lightsabers, as these were easily visible and many people complained about them after the release of the DC.
Can we somehow come up with a list of them?
They're typically much dirtier than other (surrounding) shots and in one case, at least, the framing is different.