Some characters are not displayed, what is causing this?
In this theme I have used the Cufon font replacement for the h1,h2,h3 tags. Maybe the font used does not support those characters and you have to disable the font replacement and use the default font in order to show the characters.
If you want to turn it off you have to open
script.js file and delete the lines:
Cufon.replace('h1'); Cufon.replace('h2'); Cufon.replace('h3');