I noticed that apostrophes in the new credits (e.g. Dan O'Bannon) are "straight down" rather than "curled". It's hard to tell from the GOUT, but I believe the originals were curled (at least they blur a lot like the commas, which are curled). I think the "straight down" apostrophe was a computer convention created after these credits would have been done. Then again, I could be wrong.
EDIT: The same probably applies to quote marks, which I didn't check for.