I'm see these messages in catalina.out. Any idea why?

unable to load resource bundle: /msgs/com_zimbra_date
unable to load resource bundle: /msgs/com_zimbra_email
unable to load resource bundle: /msgs/com_zimbra_phone
unable to load resource bundle: /msgs/com_zimbra_url
unable to load resource bundle: /msgs/com_zimbra_sforce
unable to load resource bundle: /msgs/com_zimbra_search
unable to load resource bundle: /msgs/com_zimbra_travelagent

Thanks for any help.

Pat