A B C said:
It looks like Audacity.

Audacity yes.
But the file is on DVD-ROM drive where Audacity cannot change it.
In the past I have used EAC's compare function. It is a useful tool but only 44.1kHz, not 48kHz.
In this case I've used a UN*X-style 'cmp' to compare the files and locate the differences (the equivalent to FC.EXE on a DOS command line.)
A very dumb program, not capable of parsing WAV files, it only tells which bytes are different.
Then I do the maths to convert byte offset into time code.
Audacity was used only for making the picture, nothing else.

Looks like the file ~400 days on a.b.starwars is the older version (2006-09-23)
so I will post the 'new' one (2006-10-28) tomorrow...