Today I started my xfce desktop and it looks like …”different”. No theme loaded, default icons, no background. I tried to change theme from Xfce Settings but nothing, it doesn’t work.
My .session-errors reveals a
The program ‘xfsettingsd’ received an X Window System error.
After a bit o googling it seems to be an aged bug of xfce when used on multiple monitor configuration.
The solution, or better, the workaround is to delete the file:
Now you can log out and log in again in your themed Xfce :-)