Help SNES FF III on DS - combat artifacts

I'm trying to run the US Final Fantasy III SNES on my Nintendo DSI have R4DS 1.18 using SNEmulDS release 0.6a.Walking through the world appears to be fine, however when I enter combat and spells are being cast, the screen gets a ton of artifactsHere is a video of what it looks like: dropbox.com/s/1ktx2pa6zm8ov1h/FFIII.movAny ideas?