Index: code/win32/win_gamma.c
===================================================================
--- code/win32/win_gamma.c	(revision 816)
+++ code/win32/win_gamma.c	(working copy)
@@ -140,6 +140,9 @@
 		return;
 	}
 
+	if (!g_wv.activeApp)
+		return;
+
 //mapGammaMax();
 
 	for ( i = 0; i < 256; i++ ) {
Index: code/win32/win_wndproc.c
===================================================================
--- code/win32/win_wndproc.c	(revision 816)
+++ code/win32/win_wndproc.c	(working copy)
@@ -47,12 +47,7 @@
 	if ( s_alttab_disabled )
 		return;
 
-	if ( !Q_stricmp( Cvar_VariableString( "arch" ), "winnt" ) )
 	{
-		RegisterHotKey( 0, 0, MOD_ALT, VK_TAB );
-	}
-	else
-	{
 		BOOL old;
 
 		SystemParametersInfo( SPI_SCREENSAVERRUNNING, 1, &old, 0 );
@@ -64,17 +59,9 @@
 {
 	if ( s_alttab_disabled )
 	{
-		if ( !Q_stricmp( Cvar_VariableString( "arch" ), "winnt" ) )
-		{
-			UnregisterHotKey( 0, 0 );
-		}
-		else
-		{
-			BOOL old;
+		BOOL old;
 
-			SystemParametersInfo( SPI_SCREENSAVERRUNNING, 0, &old, 0 );
-		}
-
+		SystemParametersInfo( SPI_SCREENSAVERRUNNING, 0, &old, 0 );
 		s_alttab_disabled = qfalse;
 	}
 }
@@ -84,6 +71,9 @@
 VID_AppActivate
 ==================
 */
+extern void R_SetColorMappings( void );
+extern void WG_RestoreGamma( void );
+
 static void VID_AppActivate(BOOL fActive, BOOL minimize)
 {
 	g_wv.isMinimized = minimize;
@@ -96,16 +86,21 @@
 	if (fActive && !g_wv.isMinimized )
 	{
 		g_wv.activeApp = qtrue;
+		R_SetColorMappings();
 	}
 	else
 	{
 		g_wv.activeApp = qfalse;
+		WG_RestoreGamma();
 	}
 
 	// minimize/restore mouse-capture on demand
 	if (!g_wv.activeApp )
 	{
 		IN_Activate (qfalse);
+
+		if ( r_fullscreen->integer )
+			ShowWindow( g_wv.hWnd, SW_MINIMIZE );
 	}
 	else
 	{