I’m having the same problem. I click “Save and Publish,” it appears to do so, but none of my changes publish–and when I click the “x” I get the “The changes you made will be lost…” dialog, so it doesn’t seem to think they’ve saved either. The custom menu widgets are there, but none of the appearance customizations are (header image, background color).
I’m on Windows 8.1 using Chrome.
