Originally Posted by JD Gumby
It's Kobo's custom epub format (which includes more things than just their own DRM, since they've had to do special coding to do simple things with regular or Adobe DRM'd epubs like dictionary lookups).
Thanks for the clarification - and to everyone else for the info too
I take it then, that if this is effectively a bug in the Kobo software, changing the font or line spacing won't fix the issue?
And what is the Kobo style option a reference to?