See, this is what happens if you almost never get any encrypted emails – you almost forget about it. The public key which is available from here pointed until today to a key file for which I’ve lost the private part quite some time ago. Somebody tried to send me an email message encrypted with this key and I was obviously unable to decrypt and read it. Sorry for the inconveniences here!
The one and only correct key with my current main email address has the key ID 160D1092, generated on 2003/03/13. If you like to send encrypted messages to me, please use only this key. There is still the other key uploaded on some public key servers (its ID is C16DFEFA) – please do not use this one! I won’t be able to read your message otherwise.
Unfortunately there doesn’t seem to be a way to revoke the public part of the missing key without either having the private key backup’d somewhere or at least having a pre-generated revoke certificate. Those key servers seem to be “ADD”-only…