diff --git a/admin/inc/class.admin_categories.inc.php b/admin/inc/class.admin_categories.inc.php
index d6a7580b6e..1209ceaaeb 100644
--- a/admin/inc/class.admin_categories.inc.php
+++ b/admin/inc/class.admin_categories.inc.php
@@ -268,7 +268,8 @@ class admin_categories
 		$readonlys['button[delete]'] = !$content['id'] || !self::$acl_delete ||		// cant delete not yet saved category
 			$appname != $content['appname'] || // Can't edit a category from a different app
 			 ($this->appname != 'admin' && $content['owner'] != $GLOBALS['egw_info']['user']['account_id']);
-
+		// Make sure $content['owner'] is an array otherwise it wont show up values in the multiselectbox
+		if (!is_array($content['owner'])) $content['owner'] = explode(',',$content['owner']);
 		$tmpl = new etemplate_new('admin.categories.edit');
 		$tmpl->exec($this->edit_link,$content,$sel_options,$readonlys,$content+array(
 			'old_parent' => $content['old_parent'] ? $content['old_parent'] : $content['parent'], 'appname' => $appname
diff --git a/admin/js/app.js b/admin/js/app.js
index 97ae0cbe17..4d5c884f38 100644
--- a/admin/js/app.js
+++ b/admin/js/app.js
@@ -626,10 +626,9 @@ app.classes.admin = AppJS.extend(
 		}
 
 		// Find out what changed
-		var content = this.et2.getArrayMgr('content').getEntry('owner');
-		if (content)
+		var cat_original_owner = this.et2.getArrayMgr('content').getEntry('owner');
+		if (cat_original_owner)
 		{
-			var cat_original_owner = content.split(",");
 			var selected_groups = select_owner.get_value().toString();
 
 			for(var i =0;i < cat_original_owner.length;i++)