fix 1

fix sharenxs.com
test:
http://sharenxs.com/view/?id=keyegyb-08000096-6t58xqc
http://sharenxs.com/gallery/aq2cg0h-bzhghh2_52362c69405d3 (has `img[contains(@src,"/thumbnails/")]'`)
http://sharenxs.com/gallery/momsen-ctop_5248a80ba5793 (has `img[contains(@src,"/photos/")]'`)