Memory fault when quitting the programm

When starting musescore by a terminal it starts as expected.
When quitting the programm by clicking the red point in the upper left window corner a memory fault appears.

Terminal - excerpt:

>>>'/home/xxxx/Downloads/mscore' '/home/xxxx/Downloads/Take_Five.mscz'
Can't open '/usr/local/share/mscore-2.0//sound/aeolus/stops/Aeolus/definition' for reading
Can't open '/usr/local/share/mscore-2.0//sound/aeolus/stops/Aeolus/presets' for reading
Fluid: sf not found
Marker::read type 0
Marker::read type 1
Marker::read type 2
Marker::read type 3
Marker::read type 5
Marker::read type 6
loaded the dummy plugin
loaded the Linux plugin
ChordList::read failed:
ChordList::read failed:
setDynamicType: other <dynamicMezzodynamicPiano>
setDynamicType: other <dynamicForte>
setDynamicType: other <dynamicMezzodynamicPiano>
setDynamicType: other <dynamicFortedynamicForte>
setDynamicType: other <dynamicMezzodynamicForte>
setDynamicType: other <dynamicPianodynamicPiano>
#### all above line appears after starting
#### the next line appears when quiting the programm by the red point in the
#### upper left window corner
Speicherzugriffsfehler (Speicherabzug geschrieben)
#### translated: memory fault


Musescore Version: mscore.64bits-2014-04-12-09-03-b424d8e


>>>lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 13.10
Release: 13.10
Codename: saucy



>>>uname -a
Linux ub1 3.11.0-12-generic #19-Ubuntu SMP Wed Oct 9 16:20:46 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux