A number of people have had success getting their KVs replaced by Amazon. If it bothers your friend too, s/he should consider calling Amazon CS.
The Voyage of course has page turn buttons

and annotations work smoothly on the Kindles. But collections is rather a sore spot

-- no jailbreak (yet?).
...
Sounds like your new Kobo is serving as an admirable Sony replacement, though.
P.S. Thanks for letting us monopolize your thread.