Erreurs affichées dans le terminal lors de l'édition de fichiers avec gedit

Lorsque vous éditez un fichier, par exemple comme ceci :

r@ngf:~$ sudo gedit /etc/default/grub
[sudo] password for r: 

(gedit:1638): Gtk-WARNING **: Attempting to store changes into `/root/.local/share/recently-used.xbel', but failed:     «/root/.local/share/recently-used.xbel.CJP8XV»:     

(gedit:1638): Gtk-WARNING **: Attempting to set the permissions of `/root/.local/share/recently-used.xbel', but failed:     

(gedit:1638): Gtk-WARNING **: Attempting to store changes into `/root/.local/share/recently-used.xbel', but failed:     «/root/.local/share/recently-used.xbel.W8MHYV»:     

(gedit:1638): Gtk-WARNING **: Attempting to set the permissions of `/root/.local/share/recently-used.xbel', but failed:     

(gedit:1638): Gtk-WARNING **: Attempting to store changes into `/root/.local/share/recently-used.xbel', but failed:     «/root/.local/share/recently-used.xbel.DZG7XV»:     

(gedit:1638): Gtk-WARNING **: Attempting to set the permissions of `/root/.local/share/recently-used.xbel', but failed:     

Il montre quelques erreurs, mais cela n'affecte pas l'édition en fait -- les fichiers s'enregistrent normalement. Que peuvent signifier ces erreurs ?