diff -ur lacewing.orig/display.c lacewing/display.c
--- lacewing.orig/display.c	2006-01-21 13:31:40.000000000 +0100
+++ lacewing/display.c	2006-01-21 13:21:34.000000000 +0100
@@ -3140,7 +3140,7 @@
  do
  {
   while(ticked == 0)
-   rest(0);
+   rest(1);
     
   waiting--;
   ticked--;
diff -ur lacewing.orig/game.c lacewing/game.c
--- lacewing.orig/game.c	2006-01-21 13:31:40.000000000 +0100
+++ lacewing/game.c	2006-01-21 13:21:37.000000000 +0100
@@ -180,7 +180,7 @@
    frames_skipped++;
 
   while(ticked == 0)
-   rest(0);
+   rest(1);
 
   ticked --;
 
diff -ur lacewing.orig/menu.c lacewing/menu.c
--- lacewing.orig/menu.c	2006-01-21 13:32:08.000000000 +0100
+++ lacewing/menu.c	2006-01-21 13:29:55.000000000 +0100
@@ -361,7 +361,7 @@
   menu_input();
 
   while(ticked == 0)
-   rest(0);
+   rest(1);
   ticked --;
 
  } while(TRUE);
@@ -403,7 +403,8 @@
 
   text_mode(-1);
 
-  vsync();
+  if (options.run_vsync > 0)
+   vsync();
 
   RGB title_colour [1];
 
@@ -1375,7 +1376,9 @@
 
  game.type = game_type;
 
- vsync();
+ if (options.run_vsync > 0)
+  vsync();
+ 
  clear_bitmap(screen);
 
  begin_game();
@@ -1599,7 +1602,7 @@
   }
 
   while (ticked == 0)
-   rest(0);
+   rest(1);
 
   ticked --;
 
@@ -3203,12 +3206,13 @@
 //   textprintf_centre(menu_bmp, small_font, 320, 305, COLOUR_YELLOW8, "your time, like ");
    if (county2 > 99)
     textprintf_centre(menu_bmp, small_font, 320, 380, COLOUR_YELLOW5, "Press Space to continue.");
-   vsync();
+   if (options.run_vsync > 0)
+    vsync();
    blit(menu_bmp, screen, 0, 0, 0, 0, 640, 480);
   }
 
   while (ticked == 0)
-   rest(0);
+   rest(1);
   ticked --;
 
   county2 ++;