Maintainers for lilypond are Anthony Fok <foka@debian.org>.
You may want to refer to the following individual bug pages: lilypond-data, lilypond-doc, lilypond-doc-html, lilypond-doc-html-ca, lilypond-doc-html-cs, lilypond-doc-html-de, lilypond-doc-html-es, lilypond-doc-html-fr, lilypond-doc-html-hu, lilypond-doc-html-it, lilypond-doc-html-ja, lilypond-doc-html-nl, lilypond-doc-html-pt, lilypond-doc-html-zh, lilypond-doc-pdf, lilypond-doc-pdf-ca, lilypond-doc-pdf-de, lilypond-doc-pdf-es, lilypond-doc-pdf-fr, lilypond-doc-pdf-hu, lilypond-doc-pdf-it, lilypond-doc-pdf-nl, lilypond-doc-pdf-pt, lilypond-fonts.
You might like to refer to the lilypond package page, or to the Package Tracking System.
If you find a bug not listed here, please report it.