May 15, 2010 Patch (Portal)

{{Patch layout
 * game = portal
 * source      = http://store.steampowered.com/news/3829/
 * source-title = Portal Update Released
 * before      = May 13, 2010 Patch (Portal)
 * after       = May 25, 2010 Patch (Portal)
 * notes       =

Portal
}}
 * Fixed Portals being black rather than see-thru
 * Fixed crash when exiting
 * Fixed crash when using keyboard inside of key binding dialog