LGTM. http://codereview.appspot.com/126048/diff/1001/4 File input/regression/quote-kill-cues.ly (right): http://codereview.appspot.com/126048/diff/1001/4#newcode11 Line 11: q = \relative c' { d2 \quoteDuring #"M" { s1 } e2 \cueDuring #"M" #UP {s1} f2 } { s1 } http://codereview.appspot.com/126048/diff/1001/4#newcode14 Line 14: \displayMusic \q for debug output? http://codereview.appspot.com/126048/diff/1001/5 File ly/music-functions-init.ly (right): http://codereview.appspot.com/126048/diff/1001/5#newcode326 Line 326: (equal? (ly:music-property mus 'quoted-context-id) "cue")) string=?