Slurs not carried into parts
I have found another bug in 30e0623. It seems that slurs are not carried forward from the score into the parts for vocal parts. It is easy to reproduce the error.
1) Create a new score with at least one vocal line
2) Add notes and some slurs to the vocal stave.
3) Create a part for that line.
You will see that the slurs have disappeared in the part.