
I've converted an fb2 book in Russian to the epub format and transferred it to my reader. However all letters appear as empty little squares...Is it because of general lack of support for Russian in this model, or conversion issue, or something else?

I've transferred several PDF books to the reader. Turns out that in some of them the "resize" button actually changes the font size and in some others it doesn't. How can this be changes?
Thanks!