I'm sorry to add a +1, but the last comment is more than one year old. Deleting /home/$USER/.config/xfce4/xfce4-notes.gtkrc before launching it, solve the issue for me.
I'm sorry to add a +1, but the last comment is more than one year old. USER/.config/ xfce4/xfce4- notes.gtkrc before launching it, solve the issue for me.
Deleting /home/$