Ajusting beams of mixed 32nd and 8th notes

Steps to reproduce bug
1. Create a new score
2. Add two 32nd notes
3. Add one 8th note
4. Leave note entry mode
5. Double click on the beam between the 32nd and 8th notes
5. Adjust the handle

Expected behavior: The beam should look similar to before with the 32nd note beams staying on the inside (only the angle of the beam should change).

Actual behavior: The 32nd note beam lines flip to the outside of the eighth note beam.

MuseScore version: r. 2626

(Operating System: Windows XP)

First reported by ritmus: http://musescore.org/fr/node/4140