diff --git a/javascript/TreeDropdownField.js b/javascript/TreeDropdownField.js
new file mode 100644
index 000000000..da0042b1a
--- /dev/null
+++ b/javascript/TreeDropdownField.js
@@ -0,0 +1,237 @@
+(function($) {
+	$.entwine('ss', function($){
+		
+		var strings = {
+			'openlink': 'Open',
+			'fieldTitle': '(choose)',
+			'searchFieldTitle': '(choose or search)'
+		};
+		
+		/**
+		 * @todo Error display
+		 * @todo No results display for search
+		 * @todo Automatic expansion of ajax children when multiselect is triggered
+		 * @todo Automatic panel positioning based on available space (top/bottom)
+		 * @todo forceValue
+		 * @todo Automatic width
+		 * @todo Expand title height to fit all elements
+		 */
+		$('.TreeDropdownField').entwine({
+			onmatch: function() {
+				this.append(
+					'<span class="title"></span>' +
+					'<a href="#" title="' + strings.openLink + '" class="toggle-panel-link"></a>' +
+					'<div class="panel"><div class="tree-holder"></div></div>'
+				);
+				if(this.data('title')) this.setTitle(this.data('title'));
+			this.getPanel().hide();
+				
+				this._super();
+			},
+			getPanel: function() {
+				return this.find('.panel');
+			},
+			openPanel: function() {
+				var panel = this.getPanel(), tree = this.find('.tree-holder');
+				panel.show();
+				if(tree.is(':empty')) this.loadTree();
+			},
+			closePanel: function() {
+				this.getPanel().hide();
+			},
+			togglePanel: function() {
+				this[this.getPanel().is(':visible') ? 'closePanel' : 'openPanel']();
+			},
+			setTitle: function(title) {
+				if(!title) title = strings.fieldTitle;
+					
+				this.find('.title').text(title);
+				this.data('title', title); // separate view from storage (important for search cancellation)				
+			},
+			getTitle: function() {
+				return this.find('.title').text();
+			},
+			setValue: function(val) {
+				this.find(':input:hidden').val(val);
+			},
+			getValue: function() {
+				return this.find(':input:hidden').val();
+			},
+			loadTree: function(params, callback) {
+				var self = this, panel = this.getPanel(), treeHolder = $(panel).find('.tree-holder');
+				var params = (params) ? this.getRequestParams().concat(params) : this.getRequestParams();
+				panel.addClass('loading');
+				treeHolder.load(this.data('url-tree'), params, function(html, status, xhr) {
+					var firstLoad = true;
+					if(status == 'success') {
+						$(this)
+							.bind('loaded.jstree', function(e, data) {
+								var val = self.getValue();
+								if(val) data.inst.select_node(treeHolder.find('*[data-id=' + val + ']'));
+								firstLoad = false;
+								if(callback) callback.apply(self);
+							})
+							.jstree(self.getTreeConfig())
+							.bind('select_node.jstree', function(e, data) {
+								var node = data.rslt.obj, id = $(node).data('id');
+								if(self.getValue() == id) {
+									self.setValue(null);
+									self.setTitle(null);
+								} else {
+									self.setValue(id);
+									self.setTitle(data.inst.get_text(node));
+								}
+								
+								// Avoid auto-closing panel on first load
+								if(!firstLoad) self.closePanel();
+							});
+					}
+					
+					panel.removeClass('loading');
+				});
+			},
+			getTreeConfig: function() {
+				var self = this;
+				return {
+					'core': {
+						'initially_open': ['record-0'],
+						'animation': 0
+					},
+					'html_data': {
+						// TODO Hack to avoid ajax load on init, see http://code.google.com/p/jstree/issues/detail?id=911
+						'data': this.getPanel().find('.tree-holder').html(),
+						'ajax': {
+							'url': this.data('url-tree'),
+							'data': function(node) {
+								var id = $(node).data("id") ? $(node).data("id") : 0, params = self.getRequestParams();
+								params = params.concat([{name: 'ID', value: id}, {name: 'ajax', value: 1}]);
+								return params;
+							}
+						}
+					},
+					'ui': {
+						"select_limit" : 1,
+						'initially_select': [this.getPanel().find('.current').attr('id')]
+					},
+					'plugins': ['html_data', 'ui', 'themes']
+					// 'plugins': ['html_data', 'ui', 'themeroller']
+				};
+			},
+			/**
+			 * If the field is contained in a form, submit all form parameters by default.
+			 * This is useful to keep state like locale values which are typically
+			 * encoded in hidden fields through the form.
+			 * 
+			 * @return {array}
+			 */
+			getRequestParams: function() {
+				var form = this.parents('form');
+				return form.length ? form.serializeArray() : [];
+			}
+		});
+		$('.TreeDropdownField *').entwine({
+			getField: function() {
+				return this.parents('.TreeDropdownField:first');
+			}
+		});
+		$('.TreeDropdownField .toggle-panel-link, .TreeDropdownField span.title').entwine({
+			onclick: function(e) {
+				this.getField().togglePanel();
+				return false;
+			}
+		});
+		
+		$('.TreeDropdownField.searchable').entwine({
+			onmatch: function() {
+				this._super();
+				
+				var title = this.data('title');
+				this.find('.title').replaceWith(
+					$('<input type="text" class="title search" />')
+				);
+				this.setTitle(title ? title : strings.searchFieldTitle);
+			},
+			setTitle: function(title) {
+				if(!title) title = strings.fieldTitle;
+				
+				this.find('.title').val(title);
+			},
+			getTitle: function() {
+				return this.find('.title').val();
+			},
+			search: function(str, callback) {
+				this.openPanel();
+				this.loadTree({search: str}, callback);
+			},
+			cancelSearch: function() {
+				this.closePanel();
+				this.loadTree();
+				this.setTitle(this.data('title'));
+			}
+		});
+		
+		$('.TreeDropdownField.searchable input.search').entwine({
+			onkeydown: function(e) {
+				var field = this.getField();
+				if(e.keyCode == 13) {
+					// trigger search on ENTER key
+					field.search(this.val());
+					return false;
+				} else if(e.keyCode == 27) {
+					// cancel search on ESC key
+					field.cancelSearch();
+				}
+			}
+		});
+		
+		$('.TreeDropdownField.multiple').entwine({
+			getTreeConfig: function() {
+				var cfg = this._super();
+				cfg.checkbox = {override_ui: true};
+				cfg.plugins.push('checkbox');
+				cfg.ui.select_limit = -1;
+				return cfg;
+			},
+			loadTree: function(params, callback) {
+				var self = this, panel = this.getPanel(), treeHolder = $(panel).find('.tree-holder');
+				var params = (params) ? this.getRequestParams().concat(params) : this.getRequestParams();
+				panel.addClass('loading');
+				treeHolder.load(this.data('url-tree'), params, function(html, status, xhr) {
+					var firstLoad = true;
+					if(status == 'success') {
+						$(this)
+							.bind('loaded.jstree', function(e, data) {
+								$.each(self.getValue(), function(i, val) {
+									data.inst.check_node(treeHolder.find('*[data-id=' + val + ']'));
+								});
+								firstLoad = false;
+								if(callback) callback.apply(self);
+							})
+							.jstree(self.getTreeConfig())
+							.bind('uncheck_node.jstree check_node.jstree', function(e, data) {
+								var nodes = data.inst.get_checked(null, true);
+								self.setValue($.map(nodes, function(el, i) {
+									return $(el).data('id');
+								}));
+								self.setTitle($.map(nodes, function(el, i) {
+									return data.inst.get_text(el);
+								}));
+							});
+					}
+					
+					panel.removeClass('loading');
+				});
+			},
+			getValue: function() {
+				var val = this._super();
+				return val.split(/ *, */);
+			},
+			setValue: function(val) {
+				this._super($.isArray(val) ? val.join(',') : val);
+			},
+			setTitle: function(title) {
+				this._super($.isArray(title) ? title.join(', ') : title);
+			}
+		});
+	});
+}(jQuery));
\ No newline at end of file
diff --git a/security/Group.php b/security/Group.php
index df9e27dab..83db2c043 100644
--- a/security/Group.php
+++ b/security/Group.php
@@ -35,6 +35,12 @@ class Group extends DataObject {
 		"Hierarchy",
 	);
 	
+	function populateDefaults() {
+		parent::populateDefaults();
+		
+		if(!$this->Title) $this->Title = _t('SecurityAdmin.NEWGROUP',"New Group");
+	}
+	
 	function getAllChildren() {
 		$doSet = new DataObjectSet();