It looks like d-addicts.com, a site where majority of English subtitles for dramas were stored, underwent big changes and now subtitles are visible only for registered members.
Continue reading after the cut...
All links to subtitles have changed so links in posts here don't match those at d-addicts, so you must search for them on subtitles forum yourself now, unfortunately.
You may also try finding subtitles at this backup page.
I might fix the links to subtitles in the posts here later, once their fate be more clearer.
If anyone has more knowledge on situation and/or has anything to say, please leave a comment here.