JVC has just introduced firmware v2.10, available for download from here.
When the previous firmware, v2.00 was introduced, users were complaining of HDMI handshake issues with some fiber optic cables that were working perfectly fine before the firmware update.
This firmware aims to improve connectivity with fiber-optic cables so it is possible that JVC has found a way to restore connectivity for some of the older cables or make connectivity more stable.
It’s also possible this firmware is aimed at improving stability with some more recent 4K / 8K cables. Unfortunately, JVC doesn’t say more.
Your Autocal and manual calibration data will not be affected due to the upgrade process, and neither will your settings.
However, my personal opinion is that you should only install this firmware if you have HDMI handshake issues or you plan on changing cables around. There is a risk of bricking your projector using a firmware update, however small.
You can also possibly introduce other unintended issues, including HDMI stability issues, since the code has changed and it’s doubtful JVC can test all permutations. So let users who are having actual issues test this firmware first, then decide on a possible upgrade once users report their findings on the Forums.