suspicious messages in logfile

Mon Apr 17 12:38:34 UTC 2000

The following just appeared in our logs (BTW we are running bind 8.2.2-p5):

Apr 17 14:00:24 osiris named[5095]: Malformed response from [193.67.131.1].53 (out of data in final pass)
Apr 17 14:17:28 osiris named[5095]: Malformed response from [212.108.200.75].53 (out of data in final pass)
Apr 17 14:17:29 osiris named[5095]: Malformed response from [212.108.200.75].53 (query section mismatch (67.200.108.212.in-addr.arpa IN PTR))
Apr 17 14:27:59 osiris named[5095]: Malformed response from [193.67.131.1].53 (out of data in final pass)                                                         

What causes these "out of data in final pass" messages?