Unicode, plugins, XSLT

I use Cyrillic and in most cases I do not have problems with displaying all letters properly in OpenHAB. But I have two situations that I can not find solution for.

  1. LastFM XML transformed with XSLT… there is no normalize-unicode function that should fix it

  2. CalDAV is not returning the strings properly even with charset property set to utf8

Here is a picture:

Is there a way around?