I've just had this happen and I'm fuming about it.
When Creating a ePub from InDesign 5.5 it adds
Things like
into the code which will pass validation and display in ADE and other readers.
iBooks...will flip out because it not an ASCII character..
CS3,4 and 5 got rid of them on the fly. CS5.5 though...Grrrrrrrr
http://indesignsecrets.com/creating-...webkit-bug.php