Store builder broken - anyone else having problems?

Almost nothing works when I try to edit the appearance of my store. Preview shows nothing, and changes don’t show on the live page. Not even simple things like editing a headline.

Problem has persisted over several days, different browsers and different themes.

Mh this sounds strange and we haven’t heard of anyone else having this problem. What browser and browser version are you using so we can try to reproduce what you are mentioning.