Hi all: I am seeing many errors in /var/log/messages. Here are a few

Aug 12 20:45:05 GR13 [NCPL]: client 10.1.2.15#53: updating zone 'vrapc.cxm/IN': Unsupported RR(255): discarding
Aug 12 20:45:05 GR13 [NCPL]: client 10.2.2.11#53: updating zone 'vrapc.cxm/IN': Unsupported RR(255): discarding
Aug 12 20:45:05 GR13 [NCPL]: client 10.2.2.12#53: updating zone 'vrapc.cxm/IN': Unsupported RR(255): discarding

Not sure what this message is saying. Can you enlighten me? Thanks, Chris.