Is that the only cause of this error? I ask as I am running an all Mac environment and all Bonjour services are working: afp, printer discovery, etc. I also have a SqueezeBox which uses Bonjour for automatic player discovery.
I am running DD-WRT on a Linksys WRT54GS. The only setting I could see re: multicast was for the WAN link where I do have it filtering the packets.
Am I completely out-to-lunch here?