Internals URLs in individual web pages vs. one big page

[Graham Percival]

When looking at the web docs in individual pages, we have the following
(correct) links to the internals:
http://lilypond.org/doc/v2.4/Documentation/user/out-www/lilypond- 
internals/NoteEvent.html#NoteEvent

When looking at the "one big page", we have the following (not correct)
links:
http://lilypond.org/doc/v2.4/Documentation/user/out-www/lilypond/ 
lilypond-internals.html#NoteEvent

Why does the build process give them different URLs?  Or a better
question, how can we fix this?  :)

Cheers,
- Graham