[R. 3727] Change duration after lyrics are deleted crashes

[Mac 10.6.5]
1. Create a score with a soprano and defaults
2. Create 4 quarters in the first measure
3. Create lyrics for each note
4. Delete lyrics OR undo the lyric creation
5. Click a note head (say, the second) and press dot to change duration
--> Crash

Also note, if the lyrics are still there, hence you skip step 4:
Expected: lyric on current note stays, lyric on following note could either disappear or stay on the new shorter note
Actual: lyric on current note disappears, lyric on following note appears too high up and not quite directly under