Hi There -- I just upgraded CRM 4.0 to CRM 2011 and then applied RU1. My custom reports with pre-filtering all broke and returned all records instead of filtered records. I fixed this by simply going to the report, clicking edit, actions, Download Report and I saved the rdl file. Then I re-uploaded the same rdl file to the exact same report that I just downloaded. This somehow fixed the pre-filtering. Sounds like it might be an upgrade bug.

Best,

Phil