pittrek said:

The 2006 DVDs don't include the theatrical versions, but the 1993 laserdisc versions. They have a new audio mix (from 1993), different color timing, different editing (missing frames) ... The SW DVD is actually a merge of the 1993 laserdisc version with a 1977 theatrical opening crawl.

To call a few missing frames lost when making the telecine for "different editing" is very misleading. IIRC the '93/"GOUT" telecine is the one that have the most frames intact out of all SW-releases on video so far.