I spotted this guy in the Log Viewer:
Failed to import the item from the file [E:\Program Files\Altiris\Notification Server\Config\CoreSchedules.config]
Pre 6.0 format item xml is not supported.
[Altiris.NS.Exceptions.AeXItemImportException @ Altiris.NS]
at Altiris.NS.ItemManagement.Item.ImportItem(XmlNode itemNode, Boolean needResult, ImportResult& result)
at Altiris.NS.ItemManagement.Item.ImportItemFromFile(String xmlItemFile)
at Altiris.NS.AeXConfig.ConfigureInstallation(String installationFilePath, Boolean bNoProductInstallation)
Exception logged from:
at Altiris.Diagnostics.Logging.EventLog.ReportException(Int32 severity, String strMessage, String category, Exception exception, String footer)
at Altiris.NS.AeXConfig.ConfigureInstallation(String installationFilePath, Boolean bNoProductInstallation)
at Altiris.NS.AeXConfig.ConfigureInstallation()
at Altiris.NS.AeXConfig.Perform(IList`1 args)
at Altiris.NS.AeXConfig.Main(String[] args)
It looks like my CoreSchedules.config file format is outdated...?