A while back, I saw a posting by someone on a site, might have been X-Entertainment, confused about suddenly seeing the Jedi briefing room sequence filled full of Orrimarko aliens, which he'd never seen before. (He thought it was a special edition change, or something.)

I never noticed those aliens before, but while doing this sync I've been forced to look closely at weird parts of the frame, and DAMN if I don't notice them now. They're everywhere.

They were there in 1983 though. i checked.