Downward arpeggio does not render correctly in nightly build

A problem with the nightly builds (last one tried: MuseScoreNightly-2014-04-04-2047-8414d36.7z, Windows 7, but also seen with Linux):
Dragging the downward arpeggio to a chord does not produce a wiggled line with an arrow at the bottom, but shows only the arrow tip, pointing upwards.
Double-clicking and moving the "grips" does not help either.

In MuseScore 1.3 it works fine.
When I save this in MuseScore 1.3 and reopen it with the nightly build, the arpeggio is broken too.

Attached is a minimal MuseScore file (made with mscore 1.3) and clipped screenshots that show how this is rendered in 1.3 and 2.0nightly.