This possibly falls under the 'Ghosting improvements' mentioned in the fix list, but they finally seem to have fixed the 'bug' that most annoyed me on the Glo.
When waking from sleep activated by the 'sleep cover'/magnet, there was no full page refresh, which resulted in terrible ghosting, especially when it was set to show the book cover during sleep. This was never an issue when using the power switch to sleep, only the sleep cover/magnet.
In 3.18 it does a full page refresh when I open the cover which gets a big thumbs up from me.
