Davidfor: here is the link for the crashes in my converted kepub for The butlerian Jihad from B&N.
https://www.dropbox.com/s/k7f6nl6a2b...Jihad.zip?dl=0
It happens with the ePub and KePub.
As far as books from kobo. "International Human Resource Design" by John P. Wilson
My sideloaded ePub and KePub both crash on highlighting, But the direct download from Kobo does not.
My extra CSS for conversion is:
@page { margin: 5pt;}
body { orphans: 1; widows: 1 }
I hope some of this helps. I will try books from the MR library shortly.