bizarre packet labelings

We have a fairly customized centos 5.3 distribution, but I know of nothing that would cause the behavior I'm seeing. We don't use iptables or ipsec, secmark is enabled in the kernel. I get avc denied messages for packets that almost certainly do exist, but the targets almost never make sense (at least to me), things like ls_exec_t, lib_t, and other seemingly random types. Thoughts? avc: denied { send } for pid=3202 comm="sshd" saddr=172.27.13.41 src=22 daddr=172.27.134.1 dest=40428 netif=eth0 scontext=system_u:system_r:unconfined_t:s0-s0:c0.c1023 tcontext=system_u:object_r:lib_t:s0 tclass=packet -b