Seems the LXDE WM has allocated F11 for it's own purposes. I don't see how we can override that, the two solutions you have are:
1. configure LXDE to use some other key for fullscreen
2. configure MusE to use another key for opening the transport
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
Seems the LXDE WM has allocated F11 for it's own purposes. I don't see how we can override that, the two solutions you have are:
1. configure LXDE to use some other key for fullscreen
2. configure MusE to use another key for opening the transport