The firmware update (Ver.1.00 to Ver.1.02) incorporates the following:

1) Image quality (color reproduction) of live view and movie has been improved for relatively dark portion in whole image area.
2) Aspect ratio of live view and recorded data (only for HD movie setting) has been optimized for displaying on both camera LCD and HDTV.
3) Displayed aspect ratio of HD movie through HDMI terminal has been optimized for displaying on HDTV. (for S2500HD / S2600HD only)

Please visit the following site for further information: 

http://www.fujifilm.com/products/digital/download/s2500hd/fupd.html