There are two sets of releases for LilyPond: stable releases, and unstable development releases. Stable versions have an even-numbered ‘minor’ version number (i.e. 2.8, 2.10, 2.12, etc). Development versions have an odd-numbered ‘minor’ version number (i.e. 2.7, 2.9, 2.11, etc).
Building LilyPond is a very involved process, so we highly recommend using the precompiled binaries.
This page is for LilyPond-2.11.58 (development-branch).
Report errors to http://post.gmane.org/post.php?group=gmane.comp.gnu.lilypond.bugs.
Your suggestions for the documentation are welcome.