I have two younger brothers, both of whom play Minecraft. One of our favorite parts was playing LAN games with each other. As of 1.5, he stopped being able to even find our LAN games, while both of us can see ones he opens but cannot connect. My other brother connect to me perfectly well.
I've made sure our Java is updated, and done most of the other "fixes" I can find through google. Can someone tell me another thing to try, please? This is really annoying, and taking a lot of fun out of our Minecraft experience.