As of yesterday, August 27^th, 2007, BIND 8 is End of Life. This means no further updates will be released for this version. While recent statistics are not available, there is plenty of chance several organizations are still running a BIND 8 version.

Should you be one of these, we strongly advise you to schedule in a controlled upgrade to version 9 as soon as possible. Migrating from one major version to the next, for any software, is something you do not wish to do in a hurry when a significant security vulnerability is found.