I am using MAB in one of the widget boxes on my homepage, timeintellect.com
I uploaded a background picture (300 x 100px) so it would be the same size as the other widget images (300 x 100px).
The width of the MAB image is a big larger than the other widget images. I've checked and the original image is 300 x 100 and when I upload the image, the uploader indicates it is 300 x 100. And I'm uploading it at full size.