Well I bought mine second hand, but I think it's one of the first batch as it came with a second battery as well. Maybe mine is a golden DX50 I'm usually the person that has loads of problems so it's nice to be on the other side for once
Absolutely nothing worst than be the constant target of problem equipment, I had my fair share of those, in my case though I tend to throw myself in front of the gadget gun thinking that I'll be able to dodge the problem bullet.
I have the first batch DX50 too with the two batteries which I find very useful as I charge one over night while I am sleeping with the DX50 on. When I wake up in the morning, no juice in the DX50. I switch the battery and all set to go to work with a full charge.