Cyclone slider 2 white line

There is a white line showing on the right side of the slider. I have played with the size of the slider container as well as the size of the slides but I can’t make it go away.

I’m using the cyclone slider 2. I am sizing my images to the slider dimensions. My background is black. Some of the slides have images that don’t match the slider dimensions, so I have created slides with a black background that are the slider dimension with the actual image pasted on top. The final version is optimized.

It works great to be able to have different shape images but the white line looks bad.