In the UK we are still stuck on last years 09 update, however the Asia site has thishttp://www.sony-asia.com/support/download/553216/product/xav-601bt and the US site has this http://esupport.sony.com/US/perl/swu-download.pl?upd_id=8518&os_id=99&mdl=XAV601BT
I've used the Asia update with 100PERCENTAGESIGN results, when is the UK site going to list this update?
