iUser, first, 50% only an estimation, maybe less than that, but a significant change. (I have been using the camera a lot in the last few days, had few jobs with it). I don't use any third party batteries.... I use only Epson's original batteries. This forum is, apparently, a great place to share Epson related information. Apparently, there are some channels from this forum to Epson engeneer team of the R-D1 (I believe Sean Reid's opinion, at least, is familiar to some). Where else should such an issue be reported? As I pointed out above, a firmware upgrade is not a mechanical change. There is no real reason that it will cause a faster battery drain. It does, sometimes, and it can be fixed and had been fixed by canon's further upgrade, for example, as I have pointed out.
And on a more personal level: " I’m just sick of people being given something for free then ALWAYS finding new things to moan about, it’s NEVER going to be perfect."
Well- I didn't get my R-D1 for free, don't know about you. I paid more than 3000$ for it and had so many issues like I never had before with any other camera. I love the camera but I think the "features" that I use (hot pixel mapping) are something that we ought to have given from the first place. However- and that is the personal thing- unlike you, I don't tend to get sick of people. Not even when they make pointless arrogant comments like you just made. Somehow, I guess that someone who does not only tend to be "sick of people" but also doesn't hesitate to share his emotions on a public forum has more than one occation a day in which he is sick of people- so let me not take any more of your time!!! 😛