Well, I did a lot of tests, but I'm still experiencing the "black page trouble".
Maybe I do something wrong with the parameters...
How do you proceed to convert a .cbz manga (scanned with two pages in a file) into an .epub ?
PS : Yeah, I tried the landscape option, but I don't think the result may interest me, because if I read the book in landscape, the pages are gonna be really small, aren't they ?