Thanks for the information Ady, it sounded a little far fetched to me, but then, it wouldn't be the first time Lucasfilm gave us a fuckup like that and they had to scan the film just for the broadcast. Or maybe they did an HD transfer for the DVD already, only the quality wasn't all that great and perhaps in a lower resolution than 1080p but higher then SD? Does it look like it is the same transfer when compared to the DVD (the same color problems, the same framing etc.)?
Also, Ady, could you please check your ESB reconstruction thread, I posted a question for you there, thanks :-)