square_eyes on "[Plugin: Meta Slider] Unwanted resizing occurs when fading to from one slide to another"

All my slider images are 620 x 280.

I have resizing off and am using the NivoSlider template.

Smart crop is off and the slider set to my image size.

Yet when a slide fades to another you can see one resize horizontally. This is especially noticeable fading from a darker slide to a lighter slide, where you see a strip of 1-2 pixels on the right hand side before the lighter slide fades completely in.

For an example see http://www.budgiecollective.com/

I'm using Firefox on OSX.

http://wordpress.org/extend/plugins/ml-slider/