WARNING: Probable misconfigured neighbor

Hi,

when i was looking through the logfile of our proxy, i found a couple of
these warnings:
should i contact the people who cause these warnings? or can i just
ignore these.
or is there something i can do about it. or better yet, what exactly
makes squid think that the other side is misconfigured?
the ip address is a client of us, so they have access to use our proxy

oh yeah, it's squid 2.2.stable3 running on solaris 2.7

(i removed the ip address)
1999/06/14 08:28:32| WARNING: Probable misconfigured neighbor at x.x.x.x
1999/06/14 08:28:32| WARNING: 420 of the last 420 ICP replies are DENIED
1999/06/14 08:28:32| WARNING: No replies will be sent for the next 3600
seconds

best regards,
Jurgen.

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