Comment 2 for bug 1068859

Hello, I had the same.
Solution :

edit /usr/share/plymouth-manager/src/funcmain.py on line 223 , you will see : os.system("xterm -e' 'sudo update-alternatives --install ..... there is a double ' after xterm -e , should be just one.

This gets ride of the error.

Cheers

Marty