If you use the Reports Module and include input parameters in your report design, you are likely to be seeing errors in your Event Viewer about "must declare the scalar vairable "@UserID" or something like it.
There is a forum post about it here. http://www.dnnsoftware.com/forums/t...readpage/2
And the solution is to turn off indexing the Reports Module using this SQL script
SET SupportedFeatures = 1
WHERE FriendlyName = 'Reports'