http://news.ricoh-imaging.co.jp/rim_info2/support/
To support the new 1.4X Tele Converter.. But as I said before, this method of updating firmwares to support every new lens is actually plain stupid. They should consider to do it in the Canon's way, i.e., to update the software utility that can be used to load the new lens' data into different bodies, of various models.