Windows Vista One Year Vulnerability Report
Jeff Jones, a Strategy Director in the Microsoft Security Technology Unit, unveils the "Windows Vista one year vulnerability report"
This paper analyzes the vulnerability disclosures and security updates for the first year of Windows Vista and looks at it in the context of its predecessor, Windows XP, along with other modern workstation operating systems Red Hat, Ubuntu and Apple products.
Clearly there's still work to do, but there's also been real progress too.