You may recall that Microsoft previously issued an SSL-based security fix for Windows Phone, some months after doing so for mainstream Windows versions. Now, that fix is available for the Zune HD as well. But don’t get too excited, Zune fans—as you tend to any time something Zune-related happens—as this doesn’t represent a renewal of support for your favorite media player. There’s a version of the fix coming for KIN, too.
As with Windows Phone, you’ll see the update when you sync a Zune HD device with your PC via the Zune PC software. The update increments the build number from 4.5.109 to 4.5.114, which should give you an idea of how (non-) dramatic a change this is.