Today I had an e-pub rejected by the Lulu checker, as sometimes happened. However, this time it included information that it had been rejected by the iBook checker and the B&N checker - info that's not been provided before. I recreated the e-pub and it was accepted. But the big thing is I now know who's getting their nickers in a twist about the e-pub despite the books not been made available for sale through them.
CW - I told ya it wasn't Lulu themselves but the marketing partners giving me issues.