Mauve (11/9/2009)
Note that SQL Server 2005 Reporting Services has a bad defect related to linked reports. If the report is a linked report, the page size properties of the master report are not propogated to the linked reports. They have to be set in the linked report.See thread 710191 for additional details. http://www.sqlservercentral.com/Forums/FindPost710191.aspx
An update to the above:
It appears that the Linked Reports page size issue that was initially reported against SQL Server 2005 has NOT been fixed in SQL Server 2008 R2 RTM (10.50.1600). I.e., a Linked Report does not inherit the page size properties of the parent report.
Therefore, you will still have to explicitly set, or programatically copy them from the master report, the page size properties when you create a Linked Report.