It had a slight problem that was causing hiccups down the render chain, now fixed. Shouldn't be too long before we can cold start from the pit and get all this working as it should, then we'll see if the backend power simulation is doing it's job.
The error only showed in debug builds. I'll align those button markers while I'm at it. (Should I tell Dave that MPD button#18 should be marked "M"? Think I'll wait till later, it's not important right now).