2 ways
1) in file /jforum/WEB-INF/config/SystemGlobals.properties
change your default.container.encoding = ISO-8859-1 to UTF-8
2) in system.xml file for
Tomcat add URIEncoding parameter
<Connector port="8080" maxHttpHeaderSize="8192"
<br />
<br /> maxThreads="150" minSpareThreads="25" maxSpareThreads="75"
<br />
<br /> enableLookups="false" redirectPort="8443" acceptCount="100"
<br />
<br /> connectionTimeout="20000" disableUploadTimeout="true" URIEncoding="ISO-8859-1"/>
Problem with Search occur when parameters URIEncoding and default.container.encoding different.
[originally posted on jforum.net by r0va]