I got the free "Lonely Planet Best in Travel 2011" from the iBook store, but when I open the book in iBooks, all it displays is a little icon that looks like a chrome cloud. The iBooks controls are there when I first open the book, so I can go back to the library and bring up the ToC, but if the controls disappear after a moment, they won't come back.
I'm running 4.2.1 with the greenpoison jb. I fixed the iBook anti-DRM measure with the hunnypot fix described here:
Fix iBooks issue in iOS 4.2.1 after Jailbreak with Grenpois0n | jailbreak
Anybody else having this issue?