Too many handles on each shape
 If the bitmap uses dithering - increase the Remove Noise setting.
 If the bitmap uses dithering - increase the Remove Noise setting.
 If the handles are evenly spaced along the lines - reduce the Accuracy setting.
 If the handles are evenly spaced along the lines - reduce the Accuracy setting.
 If the handles are clustered around the corners - increase the Smoothing setting.
 If the handles are clustered around the corners - increase the Smoothing setting.