EB battle graphics

The graphics on my campaign map are more or less okay but for some reason the graphics on my battle map have never looked very good at all, it doesn't bother me that much except with the units. Even when I turn the unit detail all the way up in the video options there is always an irritating line right down the middle of every soldier and as a whole they appear rather blurry (I had these problems with RTW vanilla as well but it is more pronounced with EB). Is this a problem that can be easily fixed or is it just intrinsically connected to my video card or other hardware?