hello,
where exactly do you get this error ? I tried download something, and everything seems ok.
ADDED:
you are maybe trying to get on our page through subbie.com, now there is error, because link point to our test server. So change test.opensubtitles.org to
www.opensubtitles.org and everything will be all right (hopefully), or wait 1 day, when admin of subbie site will change that.