Graphics problem with DSfix

[profsim]

Does anyone know why this is happening?

 

Thanks for your help.

 

http://i1173.photobucket.com/albums/r593/xornand/DATA2013-03-0804-23-39-91_zps4cf0eb95.jpg

[profsim]

Ok I figured out it was in-game AA.

But I set to off a few months ago, why did it turn back on after not playing for while?