Originally Posted by kiwidude
My first instinct is to just not care about split jackets and handle the other cases, but I don't know how prevalent splits are. My guess is that a conversion was done with a split on h2 tags and that caused the jacket to split. Again if I can get my grubby hands on an example file or someone can post the HTML content of each file I can take a look as to how to cater for it if at all.
The split jackets happened before Kovid put the jacket in the metadata. It occurred when you converted a book with a Jacket in it and your preferences had pagebreaks set to insert before all h1 tags? Which I think might have been default so split jackets as theducks describes were fairly common. You ended up with the title on one page and the author/series/comments on the next.
I PM'd you an example.