Originally Posted by grooks
If it doesn't recognize a certain character it will place nonsense in it's place.
I see what you mean except the question marks aren't replacing any characters, they are added characters. For example the work "recognize" might appear as "re?cog?nize". I wonder if maybe I try loading one of these ebooks onto a memory card and then putting the card into the reader, if maybe the reader might see it differently. I'll look for a memory card and try it out and report back.