ZigZig is 100% correct. The DVD was made from the same master as the VHS and LD from 2000. The only difference are the 4 known changes. This was also aired in the EU in HD. It features a more cropped picture and a different color grade. The BR was a new scan (it might have been 4k since we are talking 2011) and features the CG Yoda to match the other two PT movies. But this new version is NOT a new scan and features no known changes. Same colors, same shots, nothing new. And no sign that it was a native 4k scan (not that it would make any difference in the FX shots which were 2k to start with).