If your program (SubDownloader, OSCAR, or any other program using opensubtitles.org doesn't work, go to preferences and change URL (host) for API to:
http://api.opensubtitles.org/xml-rpc
read more on our blog...
In these programs is URL for API already changed, so they are confirmed to work with new HOST, if you know other "confirmed" program, put in comment, I will update it here:
* SubDownloader (v2.0.10)
* Oscar (all versions)
* SolEol (v0.255)