Using firmware 3.11.0 on a Kobo Glo ghosting has not improved compared to previous firmware releases.
When opening a book
- from the home screen (ghosting: tiles of the home screen are visible)
- wake up from sleep mode (ghosting: the cover image is visible; darker parts)
- are there other ways to enter a book? Then these need a double refresh too.
a double refresh is necessary (and would be very welcome, if Kobo added this to a future firmware release) Without it you'll always end up with some ghosting issues as described in this thread and bug thread.
In a book
- images are ghosting on the next or previous page.
A page refresh that is a little more agressive page would probably fix this.