I've checked an epub and a sideloaded kepub (not converted by Calibre, just renamed as .kepub.epub) on my Glo with firmware 3.12.0, and superscripts seem to be working correctly. Is your book a kepub or epub? Have you checked the stylesheet to see if <sup> has been redefined?
Last edited by GeoffR; 12-29-2014 at 02:56 AM.
Reason: ... and a sideloaded kepub ...
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