The question of rolling back has been answered. I know folk hate the answer but not much has changed.
Get to samsung.com and use the chat there to see if they have a fix or will take the TV into service now that they broke it.
I have a Samsung F5100 32' Led TV, which had a firmware version 1014.x. I updated this with the latest version from the Samsung site (1017.0); but this has now messed up my black levels (all my blacks are getting crushed) and overall the picture quality is very dark. i havent got a reply yet from samsung, but is there anyway to remedy this? roll back to the previous firmware?
Thanks in advance