I have this issue too, both while im in a battle and the map screen.
lines that reflect the colour on the screen, lines on the bottom of the screen are vertical and lines on the right side are horizontal, and they get longer essentially forcing my game to be played in the upper leftpart of the screen. the lines will get larger and then smaller again, eventually returning back to normal, I have done what I believe to be a clean restall but now every character in non combat mode(character screen,conversations,inventory) as well as the 3d graphics for items is very blurry.
ahhh clean reinstall I shall delete all my saved game files too????
Edit: this makes the game almost unplayable as you cant time any attack as the picture is moving and in archering(l0l) the cursor doesnt change to the screen
Will regretably delete every save game file and get back to this thread
