validate_key_list failed

[Thomas Klausner]

Hi!

After adding some keys recently, I always get:
gpg: public key 6E05F681 is 27717 seconds newer than the signature                                  
gpg: public key 8D1C8442 is 86014 seconds newer than the signature                                  
gpg: public key 8D1C8442 is 86010 seconds newer than the signature                                  
gpg: public key 8D1C8442 is 86010 seconds newer than the signature                                  
gpg: public key 4A90E7A1 is 30558 seconds newer than the signature                                  
gpg: public key 3022C951 is 31305 seconds newer than the signature                                  
gpg: public key 8F1B19A5 is 9972 seconds newer than the signature                                   
gpg: public key 4A90E7A1 is 30494 seconds newer than the signature                                  
gpg: mpi larger than indicated length (2 bytes)                                                     
gpg: keyring_get_keyblock: read error: invalid packet                                               
gpg: keyring_get_keyblock failed: invalid keyring                                                   
gpg: failed to rebuild keyring cache: invalid keyring                                               
gpg: 3 marginal(s) needed, 1 complete(s) needed, classic trust model                                
gpg: mpi larger than indicated length (2 bytes)                                                     
gpg: keyring_get_keyblock: read error: invalid packet                                               
gpg: keydb_get_keyblock failed: invalid keyring                                                     
gpg: validate_key_list failed                                                                       

And the trustdb is not updated, because on the next run
I get the same error.

How can I fix this?
Or how can I find out which key it is, so I can remove it
(as workaround)?

Cheers,
 Thomas