Thanks a lot to those who are seeding the batch torrent! It's much better not having to try and seed over 2GB on my meagre connection.
And now, it's episode 21! After some consideration, I decided to put the non-karaoke sub track as the default from now on (since it's more compatible for more people), but if you're attached to the karaoke you can still watch it by switching to subtitle track #2.
Also, someone has uploaded XviD versions of episodes 18-20 for direct download:
They seem pretty good, although the karaoke is broken (though that shouldn't be a problem from now on). The site itself also has direct downloads of older episodes if you want them.