Index: wp-includes/general-template.php
===================================================================
--- wp-includes/general-template.php	(revision 14692)
+++ wp-includes/general-template.php	(working copy)
@@ -2115,9 +2115,9 @@
 		return;
 	}
 
-	echo apply_filters( 'wp_admin_css', "<link rel='stylesheet' href='" . esc_url( wp_admin_css_uri( $file ) ) . "' type='text/css' />\n", $file );
+	echo apply_filters( 'wp_admin_css', "<link rel='stylesheet' href='" . esc_url( wp_admin_css_uri( $file ) ) . "' type='text/css' media='screen' />\n", $file );
 	if ( is_rtl() )
-		echo apply_filters( 'wp_admin_css', "<link rel='stylesheet' href='" . esc_url( wp_admin_css_uri( "$file-rtl" ) ) . "' type='text/css' />\n", "$file-rtl" );
+		echo apply_filters( 'wp_admin_css', "<link rel='stylesheet' href='" . esc_url( wp_admin_css_uri( "$file-rtl" ) ) . "' type='text/css' media='screen' />\n", "$file-rtl" );
 }
 
 /**