CoD4 升级补丁即将提供下载，更新判明，具体时间未定

Additions / New Features:

    * Added Kill cam to Airstrike bombs and Claymores
    * Addition of Host Migration so if Host Leaves auto-chooses next best host

Tweaked the following Oldschool Mode settings based on feedback:

    * Added Unlimited Sprint
    * Increased Magazine Size
    * Added Ragdoll Cam

Optimizations / Tweaks:

    * Identify party by background color (in Lobby)
    * Optimized server selection for first match for better connections
    * Improved network performance for 18 player games
    * Optimized 'Chase Cam' when Spectating
    * Fixed Playlist error when attempting to join from other games
    * Handle Corrupt Create A Class data instead of kicking player