Haven't noticed the gallery thing, but I've seen others mention battery life is less. I wonder wth you did, battery life on JVK is 2-3x as long on JVK as it was on JPY for me - yes, battery life is "WTF?!" long for me. It almost outlasts my Tab which has a battery more than twice as big!
It was the opposite for me though, with JPY my battery could last 100hours. In JVK it gets me 3 days. Don't get me wrong, wifi is on all day, I listen to music everyday, surf the net, on the Market all the time, play a couple of games, but didn't use it to call and text as I was on roaming at that time.
Oh yeah, on the first day of running JVK, my battery didnt last a day, now I am on the 5th cycle and the battery is getting better. I hope by the 7th cycle it will last for 4 days, though I am not optimistic as I just unlocked it and now using local sim, so more calls and text by the day.