diff --git a/src/openseadragon.js b/src/openseadragon.js
index 5b0accb0..f84ebfb1 100644
--- a/src/openseadragon.js
+++ b/src/openseadragon.js
@@ -2313,7 +2313,7 @@ function OpenSeadragon( options ){
                           protocol !== "https:" )) {
                         onSuccess( request );
                     } else {
-                        $.console.log( "AJAX request returned %d: %s", request.status, url );
+                        $.console.error( "AJAX request returned %d: %s", request.status, url );
 
                         if ( $.isFunction( onError ) ) {
                             onError( request );
@@ -2343,7 +2343,7 @@ function OpenSeadragon( options ){
 
                 request.send(null);
             } catch (e) {
-                $.console.log( "%s while making AJAX request: %s", e.name, e.message );
+                $.console.error( "%s while making AJAX request: %s", e.name, e.message );
 
                 request.onreadystatechange = function(){};
 
diff --git a/src/strings.js b/src/strings.js
index bf960cf9..f37abcb7 100644
--- a/src/strings.js
+++ b/src/strings.js
@@ -83,7 +83,7 @@ $.extend( $, /** @lends OpenSeadragon */{
         string = container[ props[ i ] ];
 
         if ( typeof ( string ) !== "string" ) {
-            $.console.log( "Untranslated source string:", prop );
+            $.console.error( "Untranslated source string:", prop );
             string = ""; // FIXME: this breaks gettext()-style convention, which would return source
         }
 
diff --git a/src/tiledimage.js b/src/tiledimage.js
index 95ac4f3c..1942c75c 100644
--- a/src/tiledimage.js
+++ b/src/tiledimage.js
@@ -1608,7 +1608,7 @@ function loadTile( tiledImage, tile, time ) {
  */
 function onTileLoad( tiledImage, tile, time, image, errorMsg, tileRequest ) {
     if ( !image ) {
-        $.console.log( "Tile %s failed to load: %s - error: %s", tile, tile.url, errorMsg );
+        $.console.error( "Tile %s failed to load: %s - error: %s", tile, tile.url, errorMsg );
         /**
          * Triggered when a tile fails to load.
          *
@@ -1634,7 +1634,7 @@ function onTileLoad( tiledImage, tile, time, image, errorMsg, tileRequest ) {
     }
 
     if ( time < tiledImage.lastResetTime ) {
-        $.console.log( "Ignoring tile %s loaded before reset: %s", tile, tile.url );
+        $.console.warn( "Ignoring tile %s loaded before reset: %s", tile, tile.url );
         tile.loading = false;
         return;
     }