Really strange. Although now that I think about it, when I was adding this they wouldn't show up for me either and I was pulling my hair out as to why. Then I updated my build and they suddenly showed up. So maybe try a different xbmc build
OK, thanks for the suggestion Jeroen!
Although, it seems that the SVN PPA isn't working right now, from reading the sticky in the Linux forum, so I can't try it right now... My current build is only a little more thank a week old, though.
PS. where do you guys download the Subtitle script that works with refocus?