Hrm, not going to diagnose tonight, but mumble seems to have fallen over in some way. The forums also needed restarting by hand, though ts3 appears to have made it through fine. I'll get to the straggler and general diagnosis when more sober in the morning
e: OK, the tiniest bit of diagnosis. Seems to be some networking weirdness at linode frankfurt. If it persists we'll just migrate to another region, but Germany has some of the strongest privacy law, so (while it is unlikely to in any way matter in practice) it is a neat place to have servers.
I have pretty much stopped using the mumble now and just use ts3
Still planning to keep it up though, but I have no idea what actually happened to it. Log just cut off on the 14th.
Which, btw, means it was down for the better part of a week. If you do notice such stuff do give shout, I may not get to them right away, but good to know when I have a moment.