The connection refusal has begun after a computer crash. So you must be right about that. The reason why I didn't consider it in the first place is that the only torrents affected by the crash were the Dr.Gonzo ones, whose download rates have incidentally begun to drop dead a few minutes before the crash occurred. Furthermore, as you noticed, there were a few torrent searchsites down.
Now everything seems to be back to normal. If only the "Supplemental Material" torrent did work…
