The last thing you expect when you upgrade your operating system, is that you will have some of your security silently downgraded.

But that’s precisely what seems to have happened with Mac OS X Snow Leopard, which ignores that you have been keeping Adobe Flash up-to-date and downgrades it to an earlier version, as the following YouTube video shows:

via Apple ships a known vulnerable version of Flash with Snow Leopard | Graham Cluley’s blog.