Trying to give something back to the Community...
The software metering processor on a Microsoft Systems Management Server 2003 Service Pack 3-based primary site server may return an invalid file size when it handles the software metering summarization data (.sum file) from a child site server.
The issue causes duplicate file entries in the SoftwareFile table. Additionally, one entry has an invalid file size (most likely 0). Inaccurate software metering reports are generated because of this issue.
Read the complete post at http://wmug.co.uk/blogs/cliffs_blog/archive/2008/12/31/sms-2003-inaccurate-software-metering-reports-may-be-generated-from-systems-management-server-2003-service-pack-3-based-primary-site-servers.aspx