diff --git a/lib/popularity.php b/lib/popularity.php
index b6987138b5..7ab259a391 100644
--- a/lib/popularity.php
+++ b/lib/popularity.php
@@ -53,12 +53,12 @@ class Popularity
     {
         // @fixme there should be a common func for this
         if (common_config('db', 'type') == 'pgsql') {
-            if (!empty($this->out->tag)) {
-                $tag = pg_escape_string($this->out->tag);
+            if (!empty($this->tag)) {
+                $tag = pg_escape_string($this->tag);
             }
         } else {
-            if (!empty($this->out->tag)) {
-                 $tag = mysql_escape_string($this->out->tag);
+            if (!empty($this->tag)) {
+                 $tag = mysql_escape_string($this->tag);
             }
         }
         $weightexpr = common_sql_weight('fave.modified', common_config('popular', 'dropoff'));
diff --git a/scripts/deletegroup.php b/scripts/deletegroup.php
new file mode 100755
index 0000000000..5a1ac109fd
--- /dev/null
+++ b/scripts/deletegroup.php
@@ -0,0 +1,71 @@
+#!/usr/bin/env php
+<?php
+/*
+ * StatusNet - a distributed open-source microblogging tool
+ * Copyright (C) 2008, 2009, 2010, StatusNet, Inc.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+define('INSTALLDIR', realpath(dirname(__FILE__) . '/..'));
+
+$shortoptions = 'i::n::y';
+$longoptions = array('id=', 'nickname=', 'yes');
+
+$helptext = <<<END_OF_DELETEGROUP_HELP
+deletegroup.php [options]
+deletes a group from the database
+
+  -i --id       ID of the group
+  -n --nickname nickname of the group
+  -y --yes      do not wait for confirmation
+
+END_OF_DELETEGROUP_HELP;
+
+require_once INSTALLDIR.'/scripts/commandline.inc';
+
+if (have_option('i', 'id')) {
+    $id = get_option_value('i', 'id');
+    $group = User_group::staticGet('id', $id);
+    if (empty($group)) {
+        print "Can't find group with ID $id\n";
+        exit(1);
+    }
+} else if (have_option('n', 'nickname')) {
+    $nickname = get_option_value('n', 'nickname');
+    $local = Local_group::staticGet('nickname', $nickname);
+    if (empty($local)) {
+        print "Can't find group with nickname '$nickname'\n";
+        exit(1);
+    }
+    $group = User_group::staticGet('id', $local->group_id);
+} else {
+    print "You must provide either an ID or a nickname.\n";
+    print "\n";
+    print $helptext;
+    exit(1);
+}
+
+if (!have_option('y', 'yes')) {
+    print "About to PERMANENTLY delete group '{$group->nickname}' ({$group->id}). Are you sure? [y/N] ";
+    $response = fgets(STDIN);
+    if (strtolower(trim($response)) != 'y') {
+        print "Aborting.\n";
+        exit(0);
+    }
+}
+
+print "Deleting...";
+$group->delete();
+print "DONE.\n";