Some trouble at our datacenter
In case you were trying to access our systems last night around midnight (eastern time), you probably did receive an error message about a proxy error or an unreachable host. That's because our hoster did suddenly have problems with their uninterruptible power supplies at some of their racks, requiring them to power off some machines and repair the problem. While this lasted around 2 hours, it took our automated recovery processes another 2 hours to get all systems back up and running again.
We apologize for this inconvenience, though we hope with the new UPS at our datacenter there won't be such issues anymore.