When you have books with more than one genre these words are not separated by the slash. Is it a bug in XBM or can it be "repaired" by the bookcard? Last method would probably cause problems on double word genres like science fiction...
Edit: Editing multiple books: here I'm missing a possibility to change a.e. the status or the genre. Like in XMM is present.
In order to achieve what is possible, you have to try the impossible over and over again. Hermann Hesse
How about changing the Titel Background from a film strip to something book related? I know it means more work, but it would be nicer and running XMM and XBM would make them more distinguishable. Like a row of book on a shelf or a book spine.