I recently upgraded to SQL Server 2008. The primary reason was to fix an issue with SQL Server Reporting Services – Excel Export issues with nested data regions.
“Any data region nested inside of a table or matrix data region is not supported. An error is displayed in Excel if this layout is encountered.”
They reportedly fixed this issue in SQL Server 2008. I my testing supports the claim and we no longer have the “nested data region errors”.
I must say that I was impressed with the new installer. Microsoft goes to great lengths to validate your SQL Server configuration before trying to upgrade. I had one upgrade issue that I talk about in this post, that was caused by me.