var rename_group = function(old_name, new_name) {
        tweetonica.api.rename_group(old_name, new_name, function(results) {
            var tmp = [];
            for (var g in cache) {
                var info = cache[g];
                if (info.name == old_name) {
                    info.name = results.name;
                    info.rssurl = results.rssurl;
                }
                tmp[info.name] = info;
            }
            cache = tmp;
            $('#groups a').each(function() {
                var o = $(this);
                if (o.data('groupname') == old_name) {
                    o.data('groupname', new_name);
                    $('span', o).text(display_group_name(new_name, true));
                    open_group(o);
                }
            });
            check_for_updates();
        }, function(error) {
            $('#error-description').text('Sorry, we were unable to rename group. Please try again later');
            $('#error-dialog').dialog('open');
        });
    }