mtravellerh, thank you. The problem is the missing support for RTL scripts. I have e-mailed my Pocketbook IQ supplier with the attached sample files. They have confirmed that - with the exception of the PDF format - the characters aren't being displayed correctly (a JPEG image is included for reference).
carmelra's previous testing results of Hebrew using FBReaderJ for Android can be found here:
https://www.mobileread.com/forums/sho...3&postcount=18
In short, FBReaderJ (and even the original FBReader (non-PC version) and FBReader180) does not have proper RTL support. Only Pocketbook's custom-developed version has that support, but it seems that the IQ product is not using that version. This is where the problem lies.
P.S. Dulin, the FBReader app in the market is actually FBReaderJ, the original FBReader does not support Android.