Unable to change permissions on a space.

[john]

Every time I try to add a user or group to a space using the Invite Users Wizard, it takes my information and then thinks for a very long time before timing out.

The error message is:
"Please correct the errors below then click Finish.

    * A system error happened during the operation: JDBC exception on Hibernate data access; nested exception is org.hibernate.exception.GenericJDBCException: could not insert: [org.alfresco.repo.domain.hibernate.DbPermissionImpl]"

I'm running Alfresco on a Tomcat server behind Apache, so that I can enforce SSL connections, using mod_jk.  However, nothing else causes any problems.

Any suggestions?

[john]

Addendum:  This happens when I create rules on content, as well.

HOWEVER:  It happens only on *new* spaces I create.  If I change permissions on Company Home, or add a content rule to Company Home, it works correctly as far as I can tell.

[john]

Addendum the second:

It also happens when I try to create new or upload content in any custom folder under Company Home.  Creating new content in Company Home itself is working.

System is Ubuntu 7.10 server, Java 1.6, Alfresco 2.1, Apache 2.2.4

[john]

alfresco.log shows a NPE:

15:26:00,834 ERROR [org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/alfresco].[Faces Servlet]] Servlet.service() for servlet Faces Servlet threw exception
java.lang.NullPointerException
   at org.alfresco.web.bean.wizard.WizardManager.getTitle(WizardManager.java:206)
   at org.apache.jsp.jsp.wizard.container_jsp._jspService(container_jsp.java:161)
   at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
   at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:328)
   at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:315)
   at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)