Hi
I’ve been loooking for a firmware upgrade for the GZ-MC200... Not sure if it can be upgraded, not sure if any fix was delivered for this cam... But it’s now slightly old and I was unable to find anything on JVC website.
In addition - if someone knows the procedure to get info on current firmware, for this cam, that would also be great...
I have seen some firmware upgrade for another everio that enhance low-light recording, and I have just happily upgraded my still-camera firmware to be able to use SDHC cards... These two 'enhancements' would indeed be so great to extend my everio camera’s life.
Thanks in advance ! 
I’m looking here
http://support.jvc.com/consumer/custrel/index.jsp
and I don’t see any firmware updates for your model. Maybe I’m not looking in the right place, or perhaps there isn’t one.