niknetniko on "[Plugin: NextCellent Gallery - NextGEN Legacy] Slideshows not scaling on mobile devices"

Oops, this should of course be:

.ngg-slideshow {
width: 100% !important;
max-width: 350px; /*here you want to enter the maximum width of your slideshow */
}

.ngg-slideshow img {
max-width: 100% !important;
height: auto !important;
}

My mistake!