This update is only of interest to those that wish to have the option to buy the MPEG 2 HD 422 50mbps codec upgrade.

No other updates in this version that I'm aware of.

Where is the info/link?

https://www.sony.co.uk/pro/support/software/SW_122115_PSG/30

[Contents of update]
Ver3.00
1. MPEG HD recording/playback (“CBKZ-SLMP” (sold separately) is required).
2. Remote Commander(“RM-30BP”) is now supported.