I use the report OnInit event to set custom assembly properties with parameter values. If the report also contains parameters that are query based, then the parameters collection is empty when the OnInit event fires. A report with the following attributes ran without warning in SQL RS 2005. The parameters that I set are language and theme, these parameters are completely unrelated to the parameter that is populated with availible values from a query. I applied SQL Cummulative update 1, but have not applied update 2, just downloaded it and will give that a try. I did not find this issue in the KB's listed.