arch menu icon
I had replaced the mate-panel menu icon with the arch logo, When I scaled down the panel, it flipped back at a certain size. I finally found that it had changes from /usr/share/icons/Numix/24x24/places/start-here.svg to /usr/share/icons/Numix/16x16/places/start-here.svg. Replaced the icon, killed panel, job done.