Question: Near the end when they are in the holodeck for the memorial ceremony for Lt. Yar, Dr. Crusher's uniform is green and seconds later it is blue. After watching it several times, it does not appear to be a trick of the light. What happened here? Why would she have on a green uniform in the first place?
Question: When the away team first beams down to the location where the shuttle has crash landed, the serial number on the separated nacelle is visible as 1701-D, as also seems to be inscribed on the shuttle itself. Shouldn't this serial number only appear on shuttles coming from the USS Enterprise?
Answer: The crashed shuttle is Shuttlecraft-13, which came from The Enterprise. Troi took it to the conference that she was returning from.
Chosen answer: The uniform does indeed change colour. It may be due to the need for a green screen in part, or perhaps some lighting altering our perception. That being said, it certainly looks green at the start, blue thereafter.
The show has been done in HD now and not sure if they fix this problem.
Dan23