Hi all. This rMBP has been working fine over wifi for months. Now I reconfigure my routers so that this machine is logging in through a 802.11n router (running n-only mode). All lovely, now connects at 144Mb/s even a good distance from the router. But, when I reopen the machine from sleep the Wifi is disconnected. I have to click on the wifi symbol in the status bar, and click on the appropriate network. It then reconnects after a few seconds, and all is fine again. I know this isn't a massive deal, but it is a little bit annoying. Is this a known problem or something dumb I've done? Previously when I was running in non-n mode it always reconnected immediately on opening.