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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@Maff
Hi Gordon,
Some further experimentation seems to show that it's linked to the screen not refreshing as much - if I open the About app and leave it for a minute, there's basically no ghosting when I go back to the time display, but if I open the Settings app and leave it for even ten seconds, there's ghosting. I'm guessing this is because the Settings app doesn't refresh the screen unless it's actually changing something, while the About app is refreshing every time the backer pixels segment scrolls, so there's no ghosting in areas where the screen contents are fixed (MAC address, firmware information).
That said, it also doesn't happen when going from the clock display to the app switcher, despite the time being a fairly static thing on-screen.. I can reliably reproduce it in the settings app and going -from- the settings app to anything else, but I can't reproduce it easily in anything else. Weird!
Edit: After some more futzing around, I've managed to reproduce it going from the clock face to the app list, but it seems specific to the backlight being on.