See the URL. Issues affecting 9.2.1 are linking with OpenSSL and apps linked with libbind. Apps statically linked to libbind will need to be relinked to the fixed library.
ISC report on 4th March a number of security issues they've fixed in BIND 9.2.2. These mostly revolve around supporting patched OpenSSL (which we already do), but include a "libbing: remote buffer overrun", this is actually http://www.cert.org/advisories/CA-2002-19.html which we fixed in http://rhn.redhat.com/errata/RHSA-2002-133.html