If the background image is set to the Report.Style.BackgroundImage
property, please try to move to Report.PageSettings.BackgroundImage
property. We have recently introduced some new style properties for the page settings because of a popular demand and now the report's style is applied only for the report area which does not include page sections.
Hope this helps.
the Telerik team
Have you tried the new visualization options in Telerik Reporting Q1 2013? You can get them from your account.