There's a bug... Replace line 297 with:

img.alt=this.localiser.localise("script_title");

Original version had this.localiser.localiser, which doesn't exist and the script bums out

Some of the thumbnails aren't coming out as square, so here's the fix:

Replace line 72 with:
rv.push(mgrps[2].replace(/(?:_[mt])?.jpg$/, "_s.jpg"));