mgmueller,
I know you are not reading Hebrew, but may I ask you to check if your devices support Hebrew ePub properly?
I'm aware it's a big request and if you'll prefer not to deal with it, that's fine. This thread is great and helpful anyway.
I uploaded here an example of an Hebrew ePub and a few screen captures of applications and the way the first page of the first chapter is being displayed.
It displays OK on EPUBReader, FBReader, AZARDI, Calibre and Stanza (on iPhone).
on ADE, the text is being displayed LTR (instaed of RTL) although it is properly aligned to the right. The TOC is being displayed properly (although it is aligned to the left).
I know it displays properly on PocketBook (note: while using FBReader!) and it doesn't display properly on the Sony devices (the text is being displayed LTR (instaed of RTL) although it is properly aligned to the right. The TOC is a gibberish.
Any test results on any other device will be appreciated.
Thanks,
Carmel
Hebrew eBooks at Mendele HeBooks
http://www.mendele.co.il