Firmware update is Ver. 1.55 which can be found
http://esupport.sony.com/US/perl/swu...teType=Updates
This utility updates the BDP-S1 firmware to version 1.55 and provides the following benefits:
Improvements over firmware version 1.50:
Enhanced customer support capability
Compatibility with the newly released BD-R/RE format (BDMV)
Additional improvements over original firmware:
Improves BD-Java compatibility to enhance interactivity with some BD-ROMs
Enhanced playback compatibility with certain BD-ROM format discs
Corrects the output signal status information for audio output and display when Linear PCM 5.1 channel soundtracks are played via HDMI
