Quote:
Originally Posted by
Eric Scott Richard 
Interesting, Joe. But if the frame was damaged, couldn't they have just used the materials stored in the computer from 2005 and fixed it from there?
Maybe, but there may have been problems with that approach. The scans of the original footage done for the Blu-Ray were 4K resolution, I believe. If the scans done in 2005 weren't suitable for HD, then you would have part of the frame dipping to some lower resolution. This might have looked strange, possibly stranger than the skipped 1/2 frame.
Another possibility is that they couldn't properly match the colors to the new scans. The new scans are being done on different equipment, with a different production process. Maybe the inserted 1/2 frame would have been off-color and more noticeable.
Or possibly those original scans from 2005 weren't done from the original film at all, but from some intermediate master. In the interests of purity, maybe they wanted to do everything possible to remain true to the original film and decided on the repeated frame approach, even though the intermediate master exists.
I find it more than coincidence that this damaged frame occurs in this scene. This scene is a composited scene, with the special effect of Glinda's bubble floating away, and with the live action of the Munchkins. The source films would have been run through transfer machines multiple times with mattes and transparencies to produce the final master, so it's no coincidence that the frames in this part of the film might have been more likely to suffer damage.