[Trisquel-users] Certain icons have disappeared

[LDrumbler]

I saved a drawing in Inkscape, when suddenly it returned six error messages  
in succession, and suddenly my system icons and theme were changed to  
something ugly. Changing the system settings did not fix them entirely.  
Rebooting brought my theme and most icons back, but now I have no icons for  
the entries Places, Switch User, Log Out, Lock Screen, and Power Off on the  
Trisquel menu.