I noticed a problem with Mavericks lately. I did a fresh install on my new hard drive and used Migration Assistant to import my stuff back. Everything was working fine: I click the WiFi button in the menu bar, the little scanning wheel spins, and it refreshes the list of wifi networks nearby. Then, I clicked "Open network preferences " to view my network settings (didn't change anything) and now when I click the WiFi button in the menu bar, it doesn't refresh or scan for new networks. I know it's working because I can go to Network settings > Assist > Diagnose and it has a pop-up box that shows me refreshed networks, but the WiFi button doesn't work anymore. Can anyone see if they have the same bug, and does anyone know how to fix it? Restarting doesn't seem to do it.