I have the same versions as you, nss-mdns-0.10 and avahi-0.6.23. Perhaps the difference for me is that, apart from a couple of packages that weren't in Entropy, I've always used Spritz to update and install new packages. I do keep portage synced and updated though
I looked at the Bug report - way out of my league - but did find the tone hectoring.
Self-righteousness is a loud din raised to drown the voice of guilt within us - Eric Hoffer
Don't believe what it says on the right - I am anything but sagely; More oniony!