Slurs lost on exchange voices (if no note in other voice at anchor point)
Ubuntu 14.04, GIT commit: bf97799
1) open attached score
2) select all
3) edit / voices / exchange 1-2
Result: first slur remains, but second is lost. Actually, "lost" is a good word. It is apparently still in the score, but no longer attached properly. Certain operations performed on the score afterward yields console errors about "zero slur", although I don't know exactly how to reproduce that.