Just as promised (http://www.gsmarena.com/sony_xperia_s_and_sl_to_get_new_firmware_update_this_month-news-6550.php) Sony has now confirmed it is seeding a new 4.1 Jelly Bean firmware to the Xperia S, Xperia SL and Xperia acro S. It brings various improvements over the initial Jelly Bean release and is already available for download over-the-air and via the Sony PC Companion.
(http://cdn.gsmarena.com/vv/newsimg/13/08/sony-xperia-s-sl-acros-new-fw/gsmarena_001.jpg)
Here is the official changelog as provided by Sony:
For camera, we