nikonkelly wrote:
SB 800 nor SB 600 would fire on the D850 but would on the D800,
XQD card would occasionally report errors,
focus point would switch at random from single point to group af...
now, that said, it seems that the issues are fixed, but they said that they did not fix them. this is not the first time that I know of a camera being sent in, being told that there was no issue found, but they still fixed it... come on Nikon... lets be honest with your customers.
I can't speak to the SB-600 Flash, but I have used the SB-800, SB-900 and SB-5000 with my D850 with no issues. I have not had any XQD card issues (Sony and Lexar) nor have I had any focus switching. I have had my D850 since Sept 7th (date-of-release) and it has been a solid camera with absolutely no issues. Sorry to hear you have had some, but I will say, in my 30 years shooting Nikon, never once has Nikon service been anything less than completely honest, whether in or out of warranty. Best of luck.