I have two laptops sitting next to each other, both running Kubuntu 12.04, and my goal here is to share files between them using Zeroconf networking. Here's what the wiki says about how to configure Zeroconf in Kubuntu:
Procedure 1. ZeroConf Configuration
Open System Settings by going to KMenu → System Settings.
Select Network Settings.
In the left hand side of the Network Settings dialog, select the Zeroconf Service Discovery option.
If the Enable Zeroconf network browsing or the Browse local network options are not selected, please select them now and press the Apply button.
The trouble is that the Network Settings dialog does not have a Zeroconf Service Discovery option. It does have a Service Discovery option but it's all greyed out. Zeroconf does seem to be installed, and the routing table has an entry for 169.254.0.0.
I have a feeling that everything I need is there, but I can't figure out how to use it.