Just downed our first boss in Heart of Fear LFR 2nd wing and ran into a nasty bug - EVERY raider got a "You are not eligible for the following loot because you have already defeated the boss" message. I don't know if anybody else has run into this problem, or if it's just our particular raid. We held a quick check to confirm that nobody was saved to any boss in the Heart of Fear LFR 1st wing (and realistically there was barely enough time to get saved to begin with).
Apologies for lack of pictures, didn't take any in the spur of the moment.
EDIT: Confirmed to be somewhat prevalent by the bug forums on Blizzard's website: http://us.battle.net/wow/en/forum/1012660/
Caveat Raidor