Friday August 14, 2009 19:15 CEST both the webserver and the signing server suffered from a short power glitch. Due to this power glitch both servers performed a spontaneous reboot. After a reboot both servers will wait for manual input, as a critical server engineer has to enter the decryption-password. The webserver can be managed remotely, this server was operational again Friday at 22:15 CEST.
The signing server cannot be managed remotely. In order to restart the signing server a visit has been made to the hosting center this morning. The signing server is operational again since Saturday Aug 15 10:30 CEST.

No other servers were involved. The signing server will be replaced with new hardware (with a dual power supply) within a few weeks, the new server is currently under test.