diff --git a/src/components/main/compositing/mod.rs b/src/components/main/compositing/mod.rs
index 29d2041b2c67..9e3a2a1067e5 100644
--- a/src/components/main/compositing/mod.rs
+++ b/src/components/main/compositing/mod.rs
@@ -182,9 +182,14 @@ impl CompositorTask {
             let layout_chan_clone = layout_chan.clone();
             // Hook the windowing system's resize callback up to the resize rate limiter.
             do window.set_resize_callback |width, height| {
-                debug!("osmain: window resized to %ux%u", width, height);
-                *window_size = Size2D(width as int, height as int);
-                layout_chan_clone.chan.send(RouteScriptMsg(SendEventMsg(ResizeEvent(width, height))));
+                let new_size = Size2D(width as int, height as int);
+                if *window_size != new_size {
+                    debug!("osmain: window resized to %ux%u", width, height);
+                    *window_size = new_size;
+                    layout_chan_clone.chan.send(RouteScriptMsg(SendEventMsg(ResizeEvent(width, height))));
+                } else {
+                    debug!("osmain: dropping window resize since size is still %ux%u", width, height);
+                }
             }
 
             let layout_chan_clone = layout_chan.clone();
diff --git a/src/components/script/script_task.rs b/src/components/script/script_task.rs
index 01b57b73b6ba..7ef0b0035e17 100644
--- a/src/components/script/script_task.rs
+++ b/src/components/script/script_task.rs
@@ -440,7 +440,7 @@ impl ScriptContext {
     ///
     /// This function fails if there is no root frame.
     fn reflow(&mut self, goal: ReflowGoal) {
-        debug!("script: performing reflow");
+        debug!("script: performing reflow for goal %?", goal);
 
         // Now, join the layout so that they will see the latest changes we have made.
         self.join_layout();