With a standard SSRS 2005 report, with no Nevron report object embedded, it is possible to deploy an SSRS 2005 report (RDL 2.0) to an SSRS 2008 report server (and run it) with no code changes required.
Are you suggesting that, if an RDL 2.0 report contains a Nevron report object we cannot deploy that report to an SSRS 2008 report server without modifying the report RDL?
Thanks,
Michael.