Export generates RSS in UTF-8 but it probably cuts brief text in description not as UTF-8.
Item with the link "http://sdgi.ru/blog/2012/12/27/803/"
Symbol 291 of description line: " СЌРєР...
Keep on reading: "
Last "Р" before "..." is the first byte of multibyte symbol. And it has been cut on the first byte.
One more error with exporting RSS:
Pubdates are generated on Russian: "<pubdate>Чт, Дек 27, 2012</pubdate>".
I think it should be formatted like this: "<pubDate>Thu, 27 Dec 2012 05:38:12 +0000</pubDate>" (even if the site is in Russian).
Please help to make correct rss export.