Index: wp-admin/includes/ajax-actions.php
===================================================================
--- wp-admin/includes/ajax-actions.php	(revision 23989)
+++ wp-admin/includes/ajax-actions.php	(working copy)
@@ -2271,14 +2271,13 @@
 
 		if ( ( $compare_two_mode || -1 !== $previous_revision_id ) ) {
 			$all_the_revisions[] = array (
-				'ID'                   => $revision->ID,
-				'titleTo'              => $revision_date_author,
-				'titleFrom'            => $revision_from_date_author,
-				'titleTooltip'         => $revision_date_author_short,
-				'restoreLink'          => urldecode( $restore_link ),
-				'revision_toload'      => true,
-				'previous_revision_id' => $previous_revision_id,
-				'is_current_revision'  => $is_current_revision,
+				'ID'           => $revision->ID,
+				'titleTo'      => $revision_date_author,
+				'titleFrom'    => $revision_from_date_author,
+				'titleTooltip' => $revision_date_author_short,
+				'restoreLink'  => urldecode( $restore_link ),
+				'previousID'   => $previous_revision_id,
+				'isCurrent'    => $is_current_revision,
 			);
 		}
 		$previous_revision_id = $revision->ID;
Index: wp-admin/js/revisions.js
===================================================================
--- wp-admin/js/revisions.js	(revision 23989)
+++ wp-admin/js/revisions.js	(working copy)
@@ -59,9 +59,9 @@
 			}
 		},
 
-		reloadToLoadRevisions: function( models, reverse_direction ) {
+		loadDiffs: function( models ) {
 			var self = this,
-				revisionsToLoad = models.where( { revision_toload: true } ),
+				revisionsToLoad = models.where( { completed: false } ),
 				delay = 0;
 
 			// match slider to passed revision_id
@@ -77,29 +77,29 @@
 							add: false,
 							remove: false,
 							success: function( model ) {
-								model.set( 'revision_toload', 'false' );
+								model.set( 'completed', true );
 
 								// stop spinner when all models are loaded
-								if ( 0 === models.where( { revision_toload: true } ).length )
+								if ( 0 === models.where( { completed: false } ).length )
 									self.stopModelLoadingSpinner();
 
 								self.tickmarkView.render();
 
-								var total_changes = model.get( 'lines_added' ) + model.get( 'lines_deleted'),
-									scope_of_changes = 'vsmall';
+								var totalChanges = model.get( 'linesAdded' ) + model.get( 'linesDeleted' ),
+									scopeOfChanges = 'vsmall';
 
 								// Note: hard coded scope of changes
 								// TODO change to dynamic based on range of values
-								if  ( total_changes > 1 && total_changes <= 3 ) {
-									scope_of_changes = 'small';
-								} else if( total_changes > 3 && total_changes <= 5 ) {
-									scope_of_changes = 'med';
-								} else if( total_changes > 5 && total_changes <= 10 ) {
-									scope_of_changes = 'large';
-								} else if( total_changes > 10 ) {
-									scope_of_changes = 'vlarge';
+								if ( totalChanges > 1 && totalChanges <= 3 ) {
+									scopeOfChanges = 'small';
+								} else if ( totalChanges > 3 && totalChanges <= 5 ) {
+									scopeOfChanges = 'med';
+								} else if ( totalChanges > 5 && totalChanges <= 10 ) {
+									scopeOfChanges = 'large';
+								} else if ( totalChanges > 10 ) {
+									scopeOfChanges = 'vlarge';
 								}
-								model.set( 'scope_of_changes', scope_of_changes );
+								model.set( 'scopeOfChanges', scopeOfChanges );
 								if ( 0 !== self.rightDiff &&
 									model.get( 'ID' ) === self.revisions.at( self.rightDiff - 1 ).get( 'ID' ) ) {
 									// reload if current model refreshed
@@ -149,19 +149,19 @@
 		reloadModelSingle: function() {
 			var self = this;
 
-			// TODO: Only updates the query args yet
+			self.startRightModelLoading();
+
 			self.revisions.reload({
+				options: {
 				'showAutosaves': self.autosaves,
 				'showSplitView': self.showSplitView
-			});
+				},
 
-			self.startRightModelLoading();
-			self.revisions.fetch({ // reload revision data
 				success: function() {
 					var revisionCount = self.revisions.length;
 					self.revisionView.model = self.revisions;
 					self.revisionView.render();
-					self.reloadToLoadRevisions( self.revisions );
+					self.loadDiffs( self.revisions );
 					self.tickmarkView.model = self.revisions;
 					self.tickmarkView.render();
 					self.slider.refresh({
@@ -173,7 +173,6 @@
 				error: function() {
 					self.stopRightModelLoading();
 				}
-
 			});
 		},
 
@@ -191,7 +190,7 @@
 			self.leftHandleRevisions.fetch({
 				success: function(){
 					self.stopLeftModelLoading();
-					self.reloadToLoadRevisions( self.leftHandleRevisions );
+					self.loadDiffs( self.leftHandleRevisions );
 					self.tickmarkView.model = self.leftHandleRevisions;
 					self.slider.refresh({
 						'max': self.revisions.length
@@ -222,7 +221,7 @@
 			self.rightHandleRevisions.fetch({
 				success: function(){
 					self.stopRightModelLoading();
-					self.reloadToLoadRevisions( self.rightHandleRevisions );
+					self.loadDiffs( self.rightHandleRevisions );
 					self.tickmarkView.model = self.rightHandleRevisions;
 					self.slider.refresh({
 						'max': self.revisions.length,
@@ -250,7 +249,7 @@
 			});
 			this.revisionView.render();
 
-			this.reloadToLoadRevisions( this.revisions );
+			this.loadDiffs( this.revisions );
 
 			this.revisionsInteractions = new revisions.view.Interact({
 				model: this.revisions
@@ -262,7 +261,6 @@
 			});
 			this.tickmarkView.render();
 			this.tickmarkView.resetTicks();
-
 		}
 	});
 
@@ -633,7 +631,7 @@
 			this.toggleCompareTwoCheckbox();
 
 			// hide the restore button when on the last sport/current post data
-			$( '#restore-revision' ).toggle( ! Diff.revisions.at( Diff.rightDiff - 1 ).get( 'is_current_revision' ) );
+			$( '#restore-revision' ).toggle( ! Diff.revisions.at( Diff.rightDiff - 1 ).get( 'isCurrent' ) );
 
 			return this;
 		},
@@ -686,8 +684,7 @@
 	 */
 	Revision = revisions.model.Revision = Backbone.Model.extend({
 		idAttribute: 'ID',
-		urlRoot: ajaxurl +	'?action=revisions-data' +
-			'&show_autosaves=true&show_split_view=true&nonce=' + revisions.model.settings.nonce,
+
 		defaults: {
 			ID: 0,
 			titleTo: '',
@@ -695,19 +692,23 @@
 			titleFrom: '',
 			diff: '<div class="diff-loading"><div class="spinner"></div></div>',
 			restoreLink: '',
-			revision_toload: false,
-			lines_added: 0,
-			lines_deleted: 0,
-			scope_of_changes: 'none',
-			previous_revision_id: 0,
-			is_current_revision: false
+			completed: false,
+			linesAdded: 0,
+			linesDeleted: 0,
+			scopeOfChanges: 'none',
+			previousID: 0,
+			isCurrent: false
 		},
 
 		url: function() {
 			if ( Diff.singleRevision ) {
-				return this.urlRoot +
+				return ajaxurl +
+					'?action=revisions-data' +
+					'&show_autosaves=true' +
+					'&show_split_view=true' +
+					'&nonce=' + revisions.model.settings.nonce +
 					'&single_revision_id=' + this.id +
-					'&compare_to=' + this.get( 'previous_revision_id' ) +
+					'&compare_to=' + this.get( 'previousID' ) +
 					'&post_id=' + revisions.model.settings.post_id;
 			} else {
 				return this.collection.url() + '&single_revision_id=' + this.id;
@@ -721,7 +722,6 @@
 	 */
 	Revisions = revisions.Revisions = Backbone.Collection.extend({
 		model: Revision,
-		urlRoot: ajaxurl + '?action=revisions-data',
 
 		initialize: function( models, options ) {
 			this.options = _.defaults( options || {}, {
@@ -736,7 +736,8 @@
 		},
 
 		url: function() {
-			return this.urlRoot +
+			return ajaxurl +
+				'?action=revisions-data' +
 				'&compare_to=' + this.options.compareTo +
 				'&post_id=' + this.options.post_id +
 				'&show_autosaves=' + this.options.showAutosaves +
@@ -747,10 +748,12 @@
 		},
 
 		reload: function( options ) {
-			this.options = _.defaults( options || {}, this.options );
+			this.options = _.defaults( options.options || {}, this.options );
 
-			// TODO
-			//this.fetch();
+			this.fetch({
+				success: options.success || null,
+				error: options.error || null
+			});
 		}
 
 	} );
Index: wp-admin/css/colors-fresh.css
===================================================================
--- wp-admin/css/colors-fresh.css	(revision 23989)
+++ wp-admin/css/colors-fresh.css	(working copy)
@@ -1387,14 +1387,14 @@
 	background-color: #f7f7f7;
 }
 
-.revision-tick.loading-true {
+.revision-tick.completed-false {
 	background-color: #9999cc;
 	background: url(../images/wpspin_light.gif) no-repeat;
 	background-position: middle;
 	background-size: 1px 10px;
 }
 
-.revision-tick.loading-false {
+.revision-tick.completed-true {
 	background-color: #aaa;
 }
 
Index: wp-admin/css/colors-classic.css
===================================================================
--- wp-admin/css/colors-classic.css	(revision 23989)
+++ wp-admin/css/colors-classic.css	(working copy)
@@ -1484,14 +1484,14 @@
 	color: #0080aa;
 }
 
-.revision-tick.loading-true {
+.revision-tick.completed-false {
 	background-color: #9999cc;
 	background: url(../images/wpspin_light.gif) no-repeat;
 	background-position: middle;
 	background-size: 1px 10px;
 }
 
-.revision-tick.loading-false {
+.revision-tick.completed-true {
 	background-color: #aaa;
 }
 
Index: wp-admin/revision.php
===================================================================
--- wp-admin/revision.php	(revision 23989)
+++ wp-admin/revision.php	(working copy)
@@ -163,7 +163,7 @@
 </script>
 
 <script id="tmpl-revision-ticks" type="text/html">
-	<div class="revision-tick loading-{{{ data.revision_toload }}} scope-of-changes-{{{ data.scope_of_changes }}}"></div>
+	<div class="revision-tick completed-{{{ data.completed }}} scope-of-changes-{{{ data.scopeOfChanges }}}"></div>
 </script>
 <?php
 require_once( './admin-footer.php' );
