PPS Monitoring - Missing Parameters using a Reporting Services report in SharePoint integrated mode
If you're running Monitoring with SP1 applied and working with a Reporting Services report in your dashboard that comes from a report server in SharePoint integrated mode, you may experience an issue where your parameters don't appear in the Report Parameters section.
There's a hotfix available for this issue upon request from MS support:
http://support.microsoft.com/kb/956553/en-us