User blog comment:QueenBuffy/Game of Thrones Season 4, Trailer 1 is now Here!/@comment-5014364-20140113161756

If you look really hard at HD screencaps, when Jaime is reading through the White Book which records the deeds of Kingsguard members, you can make out that it's the page on "Ser Jaime Lannister". I *think* that the first line actually says that he was "knighted by Barristan Selmy"....when in the books, he was knighted by Arthur Dayne.

Other comments in passing by Jaime about the incident with the Kingswood Brotherhood seem to imply that they've condensed the story by giving some of Arthur Dayne's actions to Barristan. Not that big of a change, Jaime still greatly respected Barristan, and Arthur died in the war.