I haven't made any changes to the color correction or the way the video looks from the clip posted. That's the part that I'm still worried about.
The cut is mercifully just as they are walking by a window that seems to play havoc with the camera's exposure anyway, so it does a good job hiding things.
I know the cut is there so I always see it. I'm curious if anyone else can (although to be fair, a lot of the other extended Potter edits have noticeable audio/video quality change when a deleted scene appears.)
I've also started looking at the next edit point. It appears that they ham-fistedly split a scene into two and stuffed another scene between them to hide that something was removed.
That's gonna take a bit of fixing as well.
HD Edits: Hmm. I'm thinking about it. It also means going back and re-doing 3 through 5. (And frankly I'd want to re-edit #2. I think their 'professional' edit leaves something to be desired.)