@GeoffR: One issue with enforcing padding on div-inner from here is that the current synced kepub cut-off patch doesn't use !important, and is thus rendered useless, which is a bit counter-productive, since my original intent was to try to make this play nice with this very patch

. [without having to resort to kobo_extra.css]
So I'm currently playing with
Code:
div#book-columns, div#book-inner {
margin: 0 !important;
}
or even:
Code:
div#book-columns {
margin: 0 !important;
padding: 0 !important;
}
div#book-inner {
margin: 0 !important;
}
(to be extra safe).
EDIT: Or even better, see #1191 instead ;p.
(and not
Code:
div#book-columns, div#book-inner {
margin: 0 !important;
padding: 0 !important;
}
)
instead of
Code:
div#book-inner * {
margin-top: 0 !important;
margin-bottom: 0 !important;
}
So far, it looks okay, but I'll throw some more books at it

.