Not just you, it's doing it for me also.

Probably caused by:

    (function($) {
        $(document).bind('contextmenu dragstart', function(event) {
            var target = event.target || event.srcElement;
            target = $(target);
            if (target.data('ngg-protect') || target.parent('a').data('ngg-protect') || target.attr('id') == 'fancybox-img' || target.attr('id') == 'TB_Image' || target.attr('id') == 'shTopImg' || target.attr('id') == 'lightbox-image' || target.hasClass('highslide-image') || target.parents('.ngg-albumoverview').length == 1 || target.parents('.ngg-pro-album').length == 1 || photocrati_image_protection_global.enabled == '1') {
                event.preventDefault()
            }
        })
    }(jQuery));

It's extremely annoying when sites do this...