Setup URIEncoding="UTF-8" to use unversal URI encoding.

http://wiki.hudson-ci.org/display/HUDSON/Tomcat

Some versions of Tomcat (such as 5.0.28) uses iso-8859-1 to decode URLs, which
is in a clear violation of the relevant RFCs. To fix this problem, add the
following URIEncoding attribute to the connector definition in
$TOMCAT_HOME/conf/server.xml.

--- a/conf/server.xml.orig	2010-06-13 16:55:18.000000000 +0200
+++ b/conf/server.xml	2010-07-20 13:51:33.000000000 +0200
@@ -66,12 +66,14 @@
     -->
     <Connector port="8080" protocol="HTTP/1.1" 
                connectionTimeout="20000" 
+               URIEncoding="UTF-8"
                redirectPort="8443" />
     <!-- A "Connector" using the shared thread pool-->
     <!--
     <Connector executor="tomcatThreadPool"
                port="8080" protocol="HTTP/1.1" 
                connectionTimeout="20000" 
+               URIEncoding="UTF-8"
                redirectPort="8443" />
     -->           
     <!-- Define a SSL HTTP/1.1 Connector on port 8443
@@ -80,12 +82,12 @@
          described in the APR documentation -->
     <!--
     <Connector port="8443" protocol="HTTP/1.1" SSLEnabled="true"
-               maxThreads="150" scheme="https" secure="true"
+               maxThreads="150" scheme="https" secure="true" URIEncoding="UTF-8"
                clientAuth="false" sslProtocol="TLS" />
     -->
 
     <!-- Define an AJP 1.3 Connector on port 8009 -->
-    <Connector port="8009" protocol="AJP/1.3" redirectPort="8443" />
+    <Connector port="8009" protocol="AJP/1.3" URIEncoding="UTF-8" redirectPort="8443" />
 
 
     <!-- An Engine represents the entry point (within Catalina) that processes