Updated mine as soon as the new firmware came on stream with no issues. Personally I like being able to turn the intensity of the LED's down a bit as my default was the highest setting and in semi-darkness the glare was distracting.
As with any firmware updates for any device, just read and re-read the instructions to make absolutely sure of the firmware updating requirements and you should be good to go.
Though you can't always factor in God; I was updating a camera's firmware one night and a single lightning strike hit a local substation causing a power cut and a dead camera which then had to be posted off to Olympus to be sorted.
Literally another 5 seconds and I would have been ok...crap happens
