Long time ago played with this and only conclusion was that somewhere deep in eZ pdf lib something is very bad with string conversion. Didn't have time to check it better...
It's not in the ez code, its caused by the php functions used by it. So only latin 1 supported until we get time to rewrite the whole thing using ezodf code (open office integration).
Just change pagelayout_print.tpl (eg. use different header and footer). Default functionality of eZ is to invoke this template with "/layout/set/print" part of url which is added when user calls javascript.print() function.