Ian
2013:03:29-09:19:07 cats-kingdom kernel: [ 2218.850827] websec-reporter[12062]: segfault at 3d0f00 ip 00000000f755f7f3 sp 00000000f645aa58 error 4 in libc-2.11.3.so[f74e8000+167000]
This message only appears in one UTM which has VLANs and IPv6 sixxs tunnel.
The other UTM has native IPv6 over PPPoE doesn't show the kernel fault.