i have been using http://validator.idpf.org/application/validate to check the epub produced by EJSS.
it seems there are some problems in the epub generated by ejss
for example
Type File Line Position Message ERROR OEBPS/models/SHM04.xhtml - - This file should declare in the OPF the property: mathml
in an earlier file to solve this issue, i used the following method to solve, for more details read http://weelookang.blogspot.sg/2015/02/ibook-store-errors-when-passing-epub3.html
if error is on property scripted and mathml, open epub with winrar, drag out the content.opf edit it to include properties="scripted mathml"
i was hoping Ejss can auto detect and auto add this line to the content.opf in epub that
if properties="scripted mathml" add correspondingly else if properties="scripted mathml" add correspondingly
regarding the xhtml file in the description pages that i added on using bluegriffon.
ps: i have started capturing pictures that are exactly 1024x768 to meet the iBook publishing requirements which is a whole new set of requirements to make the same epub available on iBook. :)