Unable to add note in chord via click if it exists enharmonically

1. Open attached score (produced in 1.3).
2. Enable 'Note Entry'.
3. Click for C - next to the D double-flat.

Result: It isn't entered.

Note: It can be entered via keyboard using Shift and C, or adding a different note and moving it, etc.

Using MuseScore 2.0 Nightly Build (0cb6d87) - Mac 10.7.5.