I have always turned on MOO when placing lots because not everyone put the warning that they have used it. It's like my security blanket but I still get this message. It started after I updated with the 10th patch of this month but I haven't been playing since last spring and I know I didn't have it then. I really just started playing this month again. I have to say this message freaked me out first time I saw it. I thought I hadn't turned it on or the game was shutting down MOO as soon as I opened the gallery but when I took alook at the building I put down I saw nothing missing or something wrong that I could detect.