November 27, 2007 Patch (Portal)

{{Patch layout
 * game = portal
 * source      = http://store.steampowered.com/news/1333/
 * source-title = Source Engine Update Released
 * before      = October 30, 2007 Patch (Portal)
 * after       = January 26, 2008 Patch (Portal)
 * notes       =

Source Engine
}}
 * Fixed surround sound not working properly when running Windows Vista
 * SourceTV relay proxies can record demos now with
 * Fixed jittery demo playback