Confirmed workaround: sudo gedit /usr/share/themes/Ambiance/gtk-2.0/gtkrc #bg_pixmap[NORMAL] = "panel_bg.png"
sudo gedit /usr/share/themes/Radiance/gtk-2.0/gtkrc #bg_pixmap[NORMAL] = "panel_bg.png"
Log out then Log in again.
Nothing else is needed.
Thanks guys.
Confirmed workaround: themes/ Ambiance/ gtk-2.0/ gtkrc
sudo gedit /usr/share/
#bg_pixmap[NORMAL] = "panel_bg.png"
sudo gedit /usr/share/ themes/ Radiance/ gtk-2.0/ gtkrc
#bg_pixmap[NORMAL] = "panel_bg.png"
Log out then Log in again.
Nothing else is needed.
Thanks guys.