No its not a shadow its more like the graphice for a thin line are blurred, the colors are all the same etc it alomost looks like the graphics in the horizontal line stay with what ever pixels are ther for a minute before it goes into the graphics its supposed to display. It only happens when i move the character. If i stand still the lines arent ther, and its not a constant line it shows up for a second than dissapears .. 10 secods later it comes back and than dissapears etc.

And ambient occlusion i have turned off.