Can't upgrade 0.9.840 to 1.0 on Tomcat 5.5 and Postgres 8.1

Hi I'm trying to upgrade XWiki 0.9.840 to 1.0 on my FreeBSD 6.2 server running Tomcat 5.5.23 and Postgres 8.1.4. I've replaced the xwiki app, copied (AFAIK) all the settings across, but when I try to access it I get a 500 error from Tomcat. exception javax.servlet.ServletException: Error number 3 in 0: Could not initialize main XWiki context Wrapped Exception: Error number 3201 in 3: Exception while saving document XWiki.TagClass Wrapped Exception: Could not execute JDBC batch update org.apache.struts.action.RequestProcessor.processException (RequestProcessor.java:535) ... root cause com.xpn.xwiki.XWikiException: Error number 3 in 0: Could not initialize main XWiki context Wrapped Exception: Error number 3201 in 3: Exception while saving document XWiki.TagClass Wrapped Exception: Could not execute JDBC batch update com.xpn.xwiki.XWiki.getMainXWiki(XWiki.java:291) ... I deleted my XWiki and Tomcat logs and restarted the server. The attached logs are a fresh server restart and an attempt to view Main/ WebHome. (Not sure if the list allows attachments because this is my first post. Will find out soon!) Anyone have any ideas what is going on? It seems to be failing to enter a row into xwikidoc, but I've looked at the insert statement and I can 't see anything wrong with it. Thanks in advance Ashley