Something Bizarre Just Happened to My Blog Posts

Hi! I was working earlier on my index/home page and saved it and republished. No issue. However, I was just having a look at my published posts (which I looked at earlier this evening) and suddenly realised that the headings and most dates had disappeared! I quickly re-opened Sparkle, and sure enough, each individual post heading and most of the dates have just gone!

I have a copy of the site I took a few days ago and the headings are there. I will send this to Duncan but in the meantime, anyone here experienced similar? It’s rather bizarre! What should I do to fix this? I looked at all my layers, but it really has just disappeared!

One of the posts (though it’s happened to all of them)

This is my current Sparkle project:

This is a copy of the project: