When the Night King kills the Three-Eyed Raven, he slashes him diagonally from left shoulder to right hip. However, in Bran's vision, the slash appears to go from his right shoulder to his left hip.
It seems unrealistic that Kinvara can make the trip from Volantis to Meereen so quickly, since it took Tyrion half a season to cross the same distance. Two weeks have passed since the pact with the Masters, so Tyrion probably summoned her around the time of sealing the pact, or even before. Kinvara may have even seen Daenerys in the flames, and was already on her way.
Brienne claims that Davos and Melisandre abandoned Stannis. She is correct about Melisandre, but not about Davos: Stannis sent him to Castle Black.
However, that's why she's "claiming" it; she just doesn't know about these past goings-on and makes assumptions from the (to her) obvious.
Jon points at the map, citing that there are also "the Mormonts, Cerwyns, Glovers, Mazins, and Hornwoods" - yet House Cerwyn is not labeled on the map, even though their lands are south of the Starks.
During the play when the King, with entrails hanging out, falls to the stage saying "I die, and here I now must lie, oh whoa." When he speaks the words "lie, oh whoa" a cellphone can be heard ringing.
Sansa refers to Brynden "Blackfish" Tully as her uncle. He is her great-uncle.