I think I heard a similar retimed ADR line: when Luke says to Threepio, "Come on, let's go have a look," the pause before "Well, come on!" seems to be shorter.
Since Luke's back is to the camera when he says "Come on, let's go have a look," I'm assuming that it was the part that was retimed.
The pauses between the lines of the "move along" trooper are different in the mono mix. In the mono, his responses to Ben are immediate; in the stereo, there's a pause as, I suppose, the Force suggestion sinks in.
^ That's right, other subtle differences in the mono mix I think haven't been mentioned yet is the sound of the alarm that is heard throughout the detention block shootout. It may just be buried in the mix but as I recall, it's only heard when the shooting has stopped in the Dolby tracks.
There is also added sound effects for the various switches Solo touches in the Falcon when they're on their way to the rebel base that wasn't in the Dolby tracks.
We want you to be aware that we have no plans—now or in the future—to restore the earlier versions.
Sincerely, Lynne Hale publicity@lucasfilm.com