[GeoffR]

After I first upgraded I found that using the dictionary, advanced font settings, table of contents in a book caused a full screen refresh to occur every page until the book is closed and opened again. But now it has stopped hapenning, so maybe just one of those weird things that happen immediately after an upgrade.

Edit: Argh no, it's back again. It seems to happen in full-screen mode but not normal mode. It also starts happening after sleeping and waking again, so if there is no fix for this then it looks like full-screen mode has just become useless.

The menus have been changed back to black and white, like they were before 3.15.0. They not only look nicer than the weird dark-grey-on-light-grey scheme that started in 3.15.0 but the ghosting has gone too. I think the two things are connected.