Hi schleija,
> The simple pandoc epubs I generated and displayed on my old Hanvon
> Reader and the Geeksphone looked just fine.
Is the first time that I heard of Hanvon Reader. Back in October I did some
tests with my Nook, see http://ftb.rgaiacs.com/2014/10/13/mathml_ereaders.html,
and was unhappy with the output. Could you send me some photos of your Hanvon
Reader rendering the example that I used in my test?