Update RelNotes.md

Updated content regarding TF2 performance being affected by compositing.

RelNotes.md

@@ -1,6 +1,6 @@
 Steam for Linux Release Notes
 -----------------------------
-(last update: 1/08/13)
+(last update: 02/06/13)
 
 The following issues are known by Valve and might impact users of the Steam for Linux client. For more information, see the Steam for Linux official game [group](http://steamcommunity.com/app/221410) and the Steam for Linux support [site](https://support.steampowered.com/kb_cat.php?id=97).
 
@@ -27,7 +27,7 @@ Desktop Environment
   * Performance for games running in full-screen mode can be improved by checking the **Undirect Fullscreen Windows** option (located by clicking the CCSM: Composite button from the main page). This prevents CCSM from drawing each frame off-screen and then copying to the active window. For more information, see [here](http://askubuntu.com/questions/99228/does-unredirect-fullscreen-window).
   * If you have multiple monitors and are running CCSM, enabling the **Undirect Fullscreen Windows** option has no effect.
   * Performance for games running in windowed mode are affected by some settings in CCSM and Unity. To improve performance, use a desktop environment other than Unity.
-For Ubuntu 12.04, the default behavior of the Alt key displays the Unity HUD. If pressed during game play, this forces the game screen to be minimized. The solution is to disable or remap the Alt key by using the **Shortcuts** tab on the Keyboard dialog. For more information, see [here](http://askubuntu.com/questions/122209/how-do-i-modify-or-disable-the-huds-use-of-the-alt-key).
+* For Ubuntu 12.04, the default behavior of the Alt key displays the Unity HUD. If pressed during game play, this forces the game screen to be minimized. The solution is to disable or remap the Alt key by using the **Shortcuts** tab on the Keyboard dialog. For more information, see [here](http://askubuntu.com/questions/122209/how-do-i-modify-or-disable-the-huds-use-of-the-alt-key).
 * If you are using Unity 3D with an NVIDIA card, install the 310.14 driver. This driver has workarounds for extreme jitter in OpenGL applications (only applies to windowed applications if you have **Undirect Fullscreen Windows** enabled in CCSM) and additional fixes for Steam client performance.
-* If you are using the KDE desktop, disable desktop effects or set to XRender. Failure to do so will result in frame time jitter as well as performance problems when the game is running composited (i.e. windowed or **Undirect Fullscreen Windows** disabled). Another solution is to install the following [patch](https://projects.kde.org/projects/kde/kde-workspace/repository/revisions/20e6349843d9bb838673a301330d7dc5d08401a5) or to use KDE 4.9.3 or later.
+* If you are using the KDE desktop, you can improve Team Fortress 2 performance by disabling desktop effects (using the **Advanced** tab of the **System Settings** | **Desktop Effects**) or suspending desktop compositing ( **Alt** + **Shift** + **F12**. Failure to do so will result in frame time jitter as well as performance problems when the game is running composited (i.e. windowed or **Undirect Fullscreen Windows** disabled). Another solution is to install the following [patch](https://projects.kde.org/projects/kde/kde-workspace/repository/revisions/20e6349843d9bb838673a301330d7dc5d08401a5) or to use KDE 4.9.3 or later.
 * After installing Steam for Linux (on Ubuntu 12.04 with the Unity desktop environment) the icon created on the Unity Launcher is incorrect. This is an Ubuntu bug. The proper icon (the Steam gear shaft icon) appears after rebooting the machine.