6. IVTC errors - the master video will have had 3:2 pulldown applied to produce the NTSC framerate of 29.97fps. For the DVD, the video was inverse telecined (IVTCed) to convert to 23.976fps. Unfortunately there were some cadence errors in the master, resulting in some flickering artefacts on R2D2 in the scene with Ben and Luke after the Sandpeople attack. These artefacts are visible when viewing on a computer or a progressive display.
And more stuff here
And there's also the issue with the vertical filter that probably was applied to hide the poor de-interlacing job.