pam message in /var/log/messages

[nix4me]

Hi,

I am getting bombarded with the following message in the 
/var/log/messages log and I have no idea what is causing it.

Jan  2 12:33:27 localhost pam_timestamp_check: pam_timestamp: `/' 
permissions are lax
Jan  2 12:34:02 localhost last message repeated 7 times

Any ideas on what is causing this?

Mark