The so-called spiffy new editor is not as spiffy as I thought. It will destroy any code requiring literal strings surrounded by apostrophes i.e. most advanced tags will get deleted without as much as a by-your leave.

I’ve only just discovered this. My apologies of you have lost any work. I know I have lost loads. I will rectify it as and when I can recover my faith in the project.

The in-play editor works fine though. Whoop.