I don't see a bullet proof way to identify it. I would be willing to assume the risk for the 990 books in my library currently sporting two jackets. Of the 990 all but three (987) were added to my library prior to May 2010.
Update: Now I only have 987 books with two jackets and they were all added to the library prior to May 2010. 110 of them were added in April 2010.
Maybe a date added of May 2010 or before could be a limiting factor. Any found with added dates later might have to be done by hand (using tweak ePub) or jump through an extra are you sure dialog.
Last edited by DoctorOhh; 04-26-2011 at 08:37 AM.