If you use bootstrap (v2... I don't tested it with the last v3) with Supersized extension, is necessary to insert this custom css:

#supersized img{max-width: none;}

This code avoid to resize the images when there isn't proportion from browser's window and background images (example, window with minimum width and maximum height... see only a piece of image but without distortion).

I hope to see this bug fixed in the next versions.
Regards,
Michele

It is not an isuue with the extension actually. The bootstrap 2 framework automatically makes the image responsive, and in combination with the supersized image resizing script it was causing display issues.
Bootstrap 3 framework does not make the images responsive by default, so this shouldn't be an issue there.

Ok, thanks.