To follow up on my last post.....a similar issue occurs when performing an edition upgrade to Notification Services, same error codes are returned but this time against the NS component. Checking the registry / file versions also reflect the same situation...

When performing an edition upgrade on SSIS Service Pack 2 + Cumulative Update its best to uninstall the CU *before* you run the edition upgrade, this will avoid some issues that can occur when following the upgrade you come to re-apply Service Pack 2...