We recently upgraded from 11.0 to 11.2 SR9 and migrated from a single server to a two server system with the webserver running on one server with the report repository and the other server has all other services. My question is how far back do I need to down grade my installation to get rid of the ISNULL issue and the sorting issues which appear to be bugs in the current version 11.2 SR9. I need to get to a more stable environment regarding these issues. Another question would be regarding the downgrade is what other issues will I inherit by downgrading? Any help on this will be greatly appreciated.