Valve has released updates to Portal, Half-Life 2, Half-Life 2: Episode One and Half-Life 2: Episode Two have been released. The updates will be applied automatically when your Steam client is restarted. The major changes include:

Half-Life 2 Fixed crash due to long hud hint messages, seen when playing in French Fixed Lambda logo at end of credits being cut off (Mac) Added pre-caching of GLSL shaders on game launch to prevent hitching in game (Mac) Performance improvements when using anti-aliasing on ATI GPU’s

Half-Life 2: Episode One Fixed localized content not loading properly resulting in English audio Added pre-caching of GLSL shaders on game launch to prevent hitching in game (Mac) Performance improvements when using anti-aliasing on ATI GPU’s

Half-Life 2: Episode Two Improved frame rate on opening map Fixed localized content not loading properly resulting in English audio Added pre-caching of GLSL shaders on game launch to prevent hitching in game (Mac) Performance improvements when using anti-aliasing on ATI GPU’s

Portal Added pre-caching of GLSL shaders on game launch to prevent hitching in game (Mac) Performance improvements when using anti-aliasing on ATI GPU’s”