A little over a week ago, I wrote about a security advisory from Microsoft warning that Apple’s Safari Web browser for Windows introduces new vulnerabilities. Specifically, Microsoft said it allows automatic downloading of files to the Windows desktop, files that in some cases could be run without the user’s knowledge. Over the weekend, I heard from a noted security researcher who has put together a proof-of-concept exploit for this vulnerability that suggests it is more of a design flaw in Windows rather than any problem with Safari. The code comes from an analysis by Liu Die Yu, a researcher credited with finding a number of security holes in Windows, and specifically in Internet Explorer. If you visit this test link with Safari on Windows, it should automatically download a harmless file called “schannel.dll.” That file contains a short script so that the next time you start Internet Explorer it launches