abc2midi messes up with repeats in sections after a [1..[2 |] Jane found out that abc2midi output goes rather random sometimes. I've narrowed this down to sections of music after a [1..[2 |] repeat has happened. Work around by adding explicit |: for those sections, which doesn't (to my mind) look so good printed but gets correct behaviour from abc2midi.

X:1
T:Herbert the Sherbert
C:Martin Ellison
M:6/8
L:1/8
Q:1/4=165
K:Em
"Em" E2 E "C" e3 |cBA "Em" B3 |GBA GFE | "D" FAG FED |
"Em" E2 E "C" e3 |cBA "Em" B3 |GBA GFE | "D" AGF "Em" E3 :|
"Em" EFG "D" F3 |"C" EFG "Bm" F3 | "Em" Bef gfe | "Bm" ded B3 |
"D" ded A3 |ded "Em" G3 | Bde "G" dBG |"D" AGF "Em" E3 :|