wrong search results when using non latin characters - ė, š, ū, ž...

<p><span>when i type the word with non latin characters (like - žiema) to Extra fields, the module saves bad value to database [{"id":"2","value":"\u0161iema...". So then i have a bad value in the database the search doesn't work.</span></p>
<p><span>http://www.joomlart.com/forums/showthread.php?82315-Search-not-working-when-using-non-latin-characters-%26%23279%3B-%9A-%26%23363%3B-%9E...&lt;/span&gt;&lt;/p>