Extract from Doctrine_Record

    /**
     * returns an array of modified fields and associated values
     * @return array
     * @todo What about a better name? getModifiedFields?
     */
    public function getModified()
    {   
        $a = array();
 
        foreach ($this->_modified as $k => $v) {
            $a[$v] = $this->_data[$v];
        }
        return $a;
    }
 
    /**
     * REDUNDANT?
     */
    public function modifiedFields()
    {   
        $a = array();
 
        foreach ($this->_modified as $k => $v) {
            $a[$v] = $this->_data[$v];
        }
        return $a;
    }