diff --git a/javascript/dist/CMSMain.EditForm.js b/javascript/dist/CMSMain.EditForm.js
index 1cea35de..3d0b7df6 100644
--- a/javascript/dist/CMSMain.EditForm.js
+++ b/javascript/dist/CMSMain.EditForm.js
@@ -132,11 +132,18 @@
 			},
 
 			_toggleSelection: function _toggleSelection(e) {
-				var selected = this.find(':input[name=ParentType]:checked').val();
+				var selected = this.find(':input[name=ParentType]:checked').val(),
+				    holder = this.find('#Form_EditForm_ParentID_Holder');
 
 				if (selected == 'root') this.find(':input[name=ParentID]').val(0);else this.find(':input[name=ParentID]').val(this.find('#Form_EditForm_ParentType_subpage').data('parentIdValue'));
 
-				this.find('#Form_EditForm_ParentID_Holder').toggle(selected != 'root');
+				if (selected != 'root') {
+					holder.slideDown(400, function () {
+						$(this).css('overflow', 'visible');
+					});
+				} else {
+					holder.slideUp();
+				}
 			},
 
 			_changeParentId: function _changeParentId(e) {
diff --git a/javascript/dist/bundle-legacy.js b/javascript/dist/bundle-legacy.js
index f77a03ea..1013382e 100644
--- a/javascript/dist/bundle-legacy.js
+++ b/javascript/dist/bundle-legacy.js
@@ -1,2 +1,2 @@
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a=t("jQuery"),o=i(a);o["default"].entwine("ss",function(t){t(".field.urlsegment:not(.readonly)").entwine({MaxPreviewLength:55,Ellipsis:"...",onmatch:function(){this.find(":text").length&&this.toggleEdit(!1),this.redraw(),this._super()},redraw:function(){var t=this.find(":text"),e=decodeURI(t.data("prefix")+t.val()),n=e;e.length>this.getMaxPreviewLength()&&(n=this.getEllipsis()+e.substr(e.length-this.getMaxPreviewLength(),e.length)),this.find(".preview").attr("href",encodeURI(e+t.data("suffix"))).text(n)},toggleEdit:function(t){var e=this.find(":text");this.find(".preview-holder")[t?"hide":"show"](),this.find(".edit-holder")[t?"show":"hide"](),t&&(e.data("origval",e.val()),e.focus())},update:function(){var t=this,e=this.find(":text"),n=e.data("origval"),i=arguments[0],a=i&&""!==i?i:e.val();n!=a?(this.addClass("loading"),this.suggest(a,function(n){e.val(decodeURIComponent(n.value)),t.toggleEdit(!1),t.removeClass("loading"),t.redraw()})):(this.toggleEdit(!1),this.redraw())},cancel:function(){var t=this.find(":text");t.val(t.data("origval")),this.toggleEdit(!1)},suggest:function(e,n){var i=this,a=i.find(":text"),o=t.path.parseUrl(i.closest("form").attr("action")),r=o.hrefNoSearch+"/field/"+a.attr("name")+"/suggest/?value="+encodeURIComponent(e);o.search&&(r+="&"+o.search.replace(/^\?/,"")),t.ajax({url:r,success:function(t){n.apply(this,arguments)},error:function(t,e){t.statusText=t.responseText},complete:function(){i.removeClass("loading")}})}}),t(".field.urlsegment .edit").entwine({onclick:function(t){t.preventDefault(),this.closest(".field").toggleEdit(!0)}}),t(".field.urlsegment .update").entwine({onclick:function(t){t.preventDefault(),this.closest(".field").update()}}),t(".field.urlsegment .cancel").entwine({onclick:function(t){t.preventDefault(),this.closest(".field").cancel()}})})},{jQuery:"jQuery"}],9:[function(t,e,n){"use strict";t("../../src/CMSMain.AddForm.js"),t("../../src/CMSMain.EditForm.js"),t("../../src/CMSMain.js"),t("../../src/CMSMain.Tree.js"),t("../../src/CMSPageHistoryController.js"),t("../../src/RedirectorPage.js"),t("../../src/SilverStripeNavigator.js"),t("../../src/SiteTreeURLSegmentField.js")},{"../../src/CMSMain.AddForm.js":1,"../../src/CMSMain.EditForm.js":2,"../../src/CMSMain.Tree.js":3,"../../src/CMSMain.js":4,"../../src/CMSPageHistoryController.js":5,"../../src/RedirectorPage.js":6,"../../src/SilverStripeNavigator.js":7,"../../src/SiteTreeURLSegmentField.js":8}]},{},[9]);
 //# sourceMappingURL=bundle-legacy.js.map
diff --git a/javascript/src/CMSMain.EditForm.js b/javascript/src/CMSMain.EditForm.js
index 8476e611..1f97aa28 100644
--- a/javascript/src/CMSMain.EditForm.js
+++ b/javascript/src/CMSMain.EditForm.js
@@ -29,7 +29,7 @@ $.entwine('ss', function($){
 			var self = this;
 
 			self.data('OrigVal', self.val());
-			
+
 			var form = self.closest('form');
 			var urlSegmentInput = $('input:text[name=URLSegment]', form);
 			var liveLinkInput = $('input[name=LiveLink]', form);
@@ -61,7 +61,7 @@ $.entwine('ss', function($){
 		onunmatch: function() {
 			this._super();
 		},
-		
+
 		/**
 		 * Function: updateRelatedFields
 		 *
@@ -80,7 +80,7 @@ $.entwine('ss', function($){
 				}
 			});
 		},
-		
+
 		/**
 		 * Function: updateURLSegment
 		 *
@@ -96,7 +96,7 @@ $.entwine('ss', function($){
 				updateURLFromTitle.hide();
 			}
 		},
-		
+
 		/**
 		 * Function: updateBreadcrumbLabel
 		 *
@@ -110,7 +110,7 @@ $.entwine('ss', function($){
 				panelCrumb.text(title);
 			}
 		},
-		
+
 		/**
 		 * Function: _addActions
 		 *
@@ -120,7 +120,7 @@ $.entwine('ss', function($){
 		_addActions: function() {
 			var self = this;
 			var	updateURLFromTitle;
-			
+
 			// update button
 			updateURLFromTitle = $('<button />', {
 				'class': 'update ss-ui-button-small',
@@ -131,7 +131,7 @@ $.entwine('ss', function($){
 					self.updateURLSegment(self.val());
 				}
 			});
-			
+
 			// insert elements
 			updateURLFromTitle.insertAfter(self);
 			updateURLFromTitle.hide();
@@ -150,10 +150,10 @@ $.entwine('ss', function($){
 			var self = this;
 			this.find(':input[name=ParentType]').bind('click', function(e) {self._toggleSelection(e);});
 			this.find('.TreeDropdownField').bind('change', function(e) {self._changeParentId(e);});
-			
+
 			this._changeParentId();
 			this._toggleSelection();
-			
+
 			this._super();
 		},
 		onunmatch: function() {
@@ -167,15 +167,22 @@ $.entwine('ss', function($){
 		 *  (Event) e
 		 */
 		_toggleSelection: function(e) {
-			var selected = this.find(':input[name=ParentType]:checked').val();
+			var selected = this.find(':input[name=ParentType]:checked').val(),
+				holder = this.find('#Form_EditForm_ParentID_Holder');
 			// reset parent id if 'root' radiobutton is selected
 			if(selected == 'root') this.find(':input[name=ParentID]').val(0);
 			// otherwise use the old value
 			else this.find(':input[name=ParentID]').val(this.find('#Form_EditForm_ParentType_subpage').data('parentIdValue'));
 			// toggle tree dropdown based on selection
-			this.find('#Form_EditForm_ParentID_Holder').toggle(selected != 'root');
+			if(selected != 'root') {
+				holder.slideDown(400, function() {
+					$(this).css('overflow', 'visible');
+				});
+			} else {
+				holder.slideUp();
+			}
 		},
-		
+
 		/**
 		 * Function: _changeParentId
 		 *
@@ -203,7 +210,7 @@ $.entwine('ss', function($){
 			if(this.attr('id') == 'CanViewType') dropdown = $('#Form_EditForm_ViewerGroups_Holder');
 			else if(this.attr('id') == 'CanEditType') dropdown = $('#Form_EditForm_EditorGroups_Holder');
 			else if(this.attr('id') == 'CanCreateTopLevelType') dropdown = $('#Form_EditForm_CreateTopLevelGroups_Holder');
-	
+
 			this.find('.optionset :input').bind('change', function(e) {
 				var wrapper = $(this).closest('.middleColumn').parent('div');
 				if(e.target.value == 'OnlyTheseUsers') {
@@ -212,20 +219,20 @@ $.entwine('ss', function($){
 				}
 				else {
 					wrapper.removeClass('remove-splitter');
-					dropdown['hide']();	
+					dropdown['hide']();
 				}
 			});
-	
+
 			// initial state
 			var currentVal = this.find('input[name=' + this.attr('id') + ']:checked').val();
 			dropdown[currentVal == 'OnlyTheseUsers' ? 'show' : 'hide']();
-			
+
 			this._super();
 		},
 		onunmatch: function() {
 			this._super();
 		}
-	});	
+	});
 
 	/**
 	 * Class: .cms-edit-form .Actions #Form_EditForm_action_print
@@ -258,7 +265,7 @@ $.entwine('ss', function($){
 	 * A "rollback" to a specific version needs user confirmation.
 	 */
 	$('.cms-edit-form .Actions #Form_EditForm_action_rollback').entwine({
-		
+
 		/**
 		 * Function: onclick
 		 *
@@ -289,7 +296,7 @@ $.entwine('ss', function($){
 	 * Informing the user about the archive action while requiring confirmation
 	 */
 	$('.cms-edit-form .Actions #Form_EditForm_action_archive').entwine({
-		
+
 		/**
 		 * Function: onclick
 		 *
@@ -316,7 +323,7 @@ $.entwine('ss', function($){
 	 * Informing the user about the archive action while requiring confirmation
 	 */
 	$('.cms-edit-form .Actions #Form_EditForm_action_restore').entwine({
-		
+
 		/**
 		 * Function: onclick
 		 *
@@ -346,7 +353,7 @@ $.entwine('ss', function($){
 	 * Informing the user about the delete from draft action while requiring confirmation
 	 */
 	$('.cms-edit-form .Actions #Form_EditForm_action_delete').entwine({
-		
+
 		/**
 		 * Function: onclick
 		 *
@@ -372,7 +379,7 @@ $.entwine('ss', function($){
 	 * Informing the user about the unpublish action while requiring confirmation
 	 */
 	$('.cms-edit-form .Actions #Form_EditForm_action_unpublish').entwine({
-		
+
 		/**
 		 * Function: onclick
 		 *