Something I've seen happen a few times is that a folder just stops syncronising, apparantly for no reason. It usually happens after I don't connect to the internet for a few days and made changes inside the Mesh Folders, while other users on the same mesh, having been on the net, also made their own changes. After getting back on the net, the folder still is blue, but if I right click on it, it gives the option to "Add this folder to Live Mesh".
Anyone got any tips?