I've owned my BD-P4600 for just over a year now, love it, plays well, and no complaints
I haven't really bothered to do any of the firmware updates, I'm probably still on the one that came from the manufacturer. Lately, it's been taking a while for some movies to load, like a few minutes, so I'm finally going to update the machine to see if that helps.
My question is, do I have to go "step by step" with each individual upgrade that was released or do you go right away to the last one and install that one? Seems like the last one is 2.13 now? What is the right away about going about this?