Well, I suppose this isn't technically an EN problem, but when Windoz decided to "upgrade" itself the other night, my organizational structure on EN was messed up. It wasn't terrible, just several dozen notes appearing in places where they didn't belong. But I'm guessing part of the problem arose when I mistakenly "upgraded" to EN 10, which destabilized years of organization, in addition to making notes uglier and impossible to format decently.
Really, EN, you shouldn't be foisting a beta product on your user base, especially a beta product that is so bad you alienate your clients.