--- a/kwin/scene-fragment.glsl	2012-01-09 12:31:41.168808030 +0100
+++ b/kwin/scene-fragment.glsl	2012-01-09 17:40:22.084123382 +0100
@@ -12,10 +12,6 @@
 
     tex.a += float(u_forceAlpha);
 
-    if (saturation != 1.0) {
-        tex.rgb = mix(vec3(dot( vec3( 0.30, 0.59, 0.11 ), tex.rgb )), tex.rgb, saturation);
-    }
-
     tex *= modulation;
 
 #ifdef KWIN_SHADER_DEBUG