Thank you again.

I found good suggestion here

In my case english only web store it was sufficient to change only one file: /your_store/includes/languages/english.php

Find:

/ charset for web pages and emails
define('CHARSET', 'utf-8');

and replace with:

/ charset for web pages and emails
define('CHARSET', 'ISO-8859-1');

(do not forget to set permissions)

this resolved the problem.

I could not find YOUR_TEMPLATE specific file, so remember to to do the same fix after another upgrade.

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P.S. Is there any way to remove temporary links after reply is submitted?
Another words: can I edit my old reply?