I’ve seen a few cases of DNS Server (BIND) generating errors after updating Fedora Core 4 or Plesk 8.2. I’ve not ruled out which update causes the issue. The problem is the rndc key.
Plesk requires that the rndc keys be configured properly to get the status information. Newer versions of bind require a different key format. You can generate a new key with the command:
rndc-confgen -b 512 | grep -m 1 "secret" | cut -d '"' -f 2
You then have to edit your rndc.key and rndc.conf file. Stop named and then restart via the Plesk control panel.