Well, it's not really a problem. It's something that just bothers me, and I wonder if it can be solved. As you may see in this screenshot, nodes are invisible. I don't know if I'm the only one who has this problem, or if this is because of this newer version of JOSM. It's really annoying not to be able to see what are you editing and where are the nodes, as I got used to see them before. Is there a solution? Am I able to change this in the options menu?