Over the past couple of weeks, my 13" MBP seems to have developed an annoying problem. It shows it is connected to my WIFI router, but even though Dropbox, Skype etc still show a connection (and work), my browsers and Spotify often report to be offline. Switching off Wifi and reconnecting often results in those programs that were still working to lose their connection as well. Rebooting often resolves the problem for a while, but then after a while it will resurface. When the wifi connection is lost and I plug in an ethernet cable, the connection does not come back. When I plug in a PC, the connection is up and great. On wifi as well. This is really annoying. Anyone got any suggestions? Help!