Customized Style Sheets

If you edited the ReportNet style sheet (default_layout.css) or the IBM® Cognos® Business Intelligence stylesheet (globalreportstyles.css), reports will lose the formatting after upgrading. You must reapply the changes to the IBM Cognos BI stylesheets and copy the stylesheets to the IBM Cognos BI server and the Web server.
Parent topic: Upgrading Reports from IBM Cognos ReportNet