I don't know if it's a bug or it's my TV but when i pick up a book or letter and read it, after 2mn leaving the pop up window and go back to the game i can see horizontal white lines in alpha all over the screen, it disappear in 5mn but it don't append if i quickly close the pop up and go read the message from the select menu.
and i'm on Sony Bravia KDL 40W4000, and the brightness is OK not too much (like 60 on a scale of 100)
no big deal but just to know if anyone else has experienced this
EDIT : Problem solved ! think it was a luminosity problem at the end

[censored] Great game by the way, thanks Arkane & Bethesda !! it's just AWESOME !!!