Well, it looks as though v17 of Kodi is going to be the Kryptonite for this skin.
I've no idea how to fix it myself; the upgrade to the beta of 17 went smoothly enough, but there were very apparent graphical errors even on the home screen, and upon testing the new skin that comes with 17 (which is the completely gross, dull as ditch-water, flat paper look, that every idiot and his dog is going for now...) I found I couldn't switch back to this skin afterwards.
None of the other skins come close to this one in my opinion, and there's no way I want to use the newer inferior looking interface, so I guess the ride of the XBMC / KODI bus is finally coming to an end.
It's been fun, and I'm thankful to the devs who've made it so for this long, but I won't settle for using something I no longer love to look at, and the newer trends of interface design, with that boring as hell, flat paper / cell phone style, are just ugly.
A large screen device doesn't need to look like a phone.