New KB article: Error message in OpsMgr Report: “The Dundas chart for Reporting Services report item is unavailable"

Microsoft has released a KB article which addresses this issue: the OpsMgr report displays the following error message: ‘The Dundas chart for Reporting Services report item is unavailable.’

This issue occurs because there is a change in the reporting services Web.config file after you upgrade from SQL Reporting Services 2005 to SQL Server Reporting Services 2008. The changes prevent charts from being displayed within Operations Manager reports.

The resolution is described in KB977574.