FIX: A memory leak may occur when you run SQL Server 2005 Integration Services packages that are stored in the SSIS Package store
Source: Knowledge Base
Product: Microsoft SQL Server 2005 Enterprise X64 Edition
Notification Contents: New and All Modifications
FIX: A memory leak may occur when you run SQL Server 2005 Integration Services packages that are stored in the SSIS Package store
http://support.microsoft.com/kb/920205/en-US