Is there a bug with Spring Security In-Memory Conf

I believe I have done all necessary setup for my Spring Security to work with Unicode, but it's not working with having special Unicode characters in the Username when using In-memory authentication. As Spring claims to have internalisation support, could this be a bug with Spring Security In-Memory when using Unicode characters for usernames? Be assured that I have looked up references manuals, forum posts (such as, How to hold japanese characters in SPRING MVC POJO's field), and have done all the things necessary for setup for Spring internationalisation. However, I am having problems the Spring Security 3 In-Memory username matching using Unicode/special characters. Note, that my application, IDE and files uses UTF-8 and all appears well and all works well if I do not use special Unicode characters for Username. I have a feeling that this non-matching of Unicode Usernames may be a bug with Spring Security In-Memory internalisation, but need this confirmed or if I have overseen anything, please let me know?

My snippets are as follows...

web.xml

      <filter>
        <filter-name>encodingFilter</filter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
        <init-param>
          <param-name>encoding</param-name>
          <param-value>UTF-8</param-value>
        </init-param>
        <init-param>
          <param-name>forceEncoding</param-name>
          <param-value>true</param-value>
        </init-param>
      </filter>
      <filter-mapping>
        <filter-name>encodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
      </filter-mapping>

spring-servlet-context.xml

        <default-servlet-handler />

        <interceptors>      
            <beans:bean class="org.springframework.web.servlet.i18n.LocaleChangeInterceptor">
                <beans:property name="paramName" value="lang" />
            </beans:bean>

            <beans:bean class="org.springframework.web.servlet.theme.ThemeChangeInterceptor">
                <beans:property name="paramName" value="theme" />
            </beans:bean>   

        </interceptors> 


          <resources mapping="/resources/**" location="/resources/" />


        <beans:bean id="messageSource" class="org.springframework.context.support.ReloadableResourceBundleMessageSource">
            <beans:property name="basename" value="classpath:messages" />
            <beans:property name="defaultEncoding" value="UTF-8"/>
        </beans:bean>

        <beans:bean id="localeResolver" class="org.springframework.web.servlet.i18n.CookieLocaleResolver">
            <beans:property name="defaultLocale" value="en"/>
        </beans:bean>

        <!-- Theme setup --> 
        <beans:bean id="themeSource" class="org.springframework.ui.context.support.ResourceBundleThemeSource">
                <beans:property name="basenamePrefix" value="theme-" />
        </beans:bean>

        <beans:bean id="themeResolver" class="org.springframework.web.servlet.theme.CookieThemeResolver">
            <beans:property name="defaultThemeName" value="default" />
        </beans:bean>


        <beans:import resource="spring-security.xml"/>

         <context:component-scan base-package="com.myproject.platform" />

    </beans:beans>

spring-security.xml

      <beans:bean id="encoder" class="org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder" />              


      <authentication-manager alias="authenticationManager">
        <authentication-provider user-service-ref="userService">                
            <password-encoder ref="encoder" />                      
        </authentication-provider> 
      </authentication-manager>

      <beans:import resource="user-security-bean-config.xml"/>

user-security-bean-config.xml

        <user-service id="userService">
          <user name="ışığı" password="encodedpasswordstring" 
                         authorities="R_U,R_A"/>

        </user-service>

Note, if I have user name as, for example, isigi (without special unicode characters), then all works well.

In my jsp files, I have at the top line:

<%@ page language="java" session="false" contentType="text/html; charset=utf-8" pageEncoding="UTF-8"%>

... and in the head section, I have...

<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

And my xml files, UTF-8 declared at the top line, e.g.,

<?xml version="1.0" encoding="UTF-8"?>

No exceptions or errors are thrown.

For the benefit of others who may experience similar problems, the ORDER of the encodingFilter in the web.xml file is very important and it must be at the top of the filter list otherwise it will not work. Even though I have read the link that I posted, somehow I missed it twice, until I read the third late last night. I forgot to mention in my post that I had correctly configured Tomcat settings to UTF-8 in the server.xml file by adding URIEncoding="UTF-8" in the appropriate places as follows:

<Connector port="8080" protocol="HTTP/1.1"
           connectionTimeout="20000"
           redirectPort="8443" 
       URIEncoding="UTF-8"/>


<Connector port="8009" protocol="AJP/1.3" redirectPort="8443" URIEncoding="UTF-8" />