[GeoffR]

So is it really true that Kobo have removed the old full-screen mode and replaced it with something that doesn't work as well?

Or is it still possible to get the old full-screen mode (where every pixel of the screen was usable in ePubs) if you have fullScreenReading=true under [Reading] in the config file?

I'm still on 4.8.11073, and I think I'll be staying there if there is no longer a proper full screen reading mode.

Edit: The old full-screen mode had these features, are they still possible with this firmware?
1. Top/bottom margin sizes were adjustable via the margins slider in KePubs (and, with a patch, in ePubs)
2. True full screen (every pixel usable for book content) possible in ePubs (and, with a patch, in KePubs)