alphabetical & tree view for pages just hangs when clicked in browse space

System Information System Date Friday, 28 Dec 2007 System Time 08:07:29 System Favourite Colour Ecru Java Version 1.5.0_07 Java Vendor Sun Microsystems Inc. JVM Version 1.0 JVM Vendor Sun Microsystems Inc. JVM Implementation Version 1.5.0_07-b03 Java Runtime Java(TM) 2 Runtime Environment, Standard Edition Java VM Java HotSpot(TM) Server VM User Name root User Timezone US/Eastern Operating System SunOS 5.10 OS Architecture x86 Filesystem Encoding UTF-8 Java VM Memory Statistics Total Memory 2047 MB Free Memory 364 MB Used Memory 1683 MB Memory Graph [Used Memory (82 %)] [Free Memory (18 %)] 18 % Free Runtime Information Database Dialect net.sf.hibernate.dialect.PostgreSQLDialect Database Connection URL jdbc:postgresql://localhost:5432/confluencedb Database Driver Name org.postgresql.Driver Database Driver Version 8.2 Application Server Apache Tomcat/5.5.23 Servlet Version 2.4 Server Base Url http://wiki.ppdev.mc.xerox.com:8080 Confluence Home /usr/local/confluence-data Uptime 21 minutes, 20 seconds Confluence Version 2.6.1 Build Number 916