From the site...

Impending Downtime
2015-12-17 14:33:09

We think we have identified the problem that has made many torrents fail. We've had a disk failure and our disk array is offline. We have started the process of procuring a replacement, but it doesn't look like it will arrive today. We will be taking the site down in light of the disk problems, and hope to be back quickly once down, but no guarantees, as usual. News about the downtime will be provided in the main IRC channel, and possibly on the outage page that will be put up.