This issue isn't a big deal, but it does ruin things a bit sometimes. Basically, when I start a LAN world, I can see my skin, and my brother's skin. He cannot see my skin, however. When he starts a world, he can see his skin and mine, but I can't see his. My brother is not using a resource pack, and I'm using the Faithful 32x32 pack, but it does the same thing even if we both use default textures. The same thing also happened at my friend's house, so it's not the internet.