diff --git a/wp-includes/js/tinymce/skins/wordpress/wp-content.css b/wp-includes/js/tinymce/skins/wordpress/wp-content.css
index d5badccb2a..39af33835f 100644
--- a/wp-includes/js/tinymce/skins/wordpress/wp-content.css
+++ b/wp-includes/js/tinymce/skins/wordpress/wp-content.css
@@ -333,11 +333,11 @@ audio {
 .wpview-wrap .wpview-loading ins {
 	background-color: #333;
 	margin: 0 0 0 -60px;
-	width: 60px;
+	width: 36px;
 	height: 5px;
 	display: block;
-	-webkit-animation: wpview-loading 1.3s infinite 1s linear;
-	animation: wpview-loading 1.3s infinite 1s linear;
+	-webkit-animation: wpview-loading 1.3s infinite 1s steps(36);
+	animation: wpview-loading 1.3s infinite 1s steps(36);
 }
 
 @-webkit-keyframes wpview-loading {
diff --git a/wp-includes/version.php b/wp-includes/version.php
index ee1fcbcd94..0cd696a614 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.5-beta3-36975';
+$wp_version = '4.5-beta3-36976';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.