Hey guys, if you still have issues with the previous iBooks fix, i recommend you to update your Corona, it should be version 1.0-5 now in Cydia. Just update it, and voila, iBooks will works as you reinstall the iBooks. Mine is at version 1.5 .
Just update it even though you jailbroke it via RedSnow. Have a nice day!!
And don’t forget to uninstall the previous fix too.