WiFi looses connection when idling

Hi,
I've updated to Mavericks and since then I've following issue. If my network connection idles for a certain amount of time, Mavericks decides to drop the connection. The WiFi smybol gets greyed out and I have to maually reconnect to my network. Following can be seen in the console:
23/10/13 07:59:25,000 kernel[0]: wlEvent: en1 en1 Link DOWN virtIf = 0
23/10/13 07:59:25,000 kernel[0]: wl0: Beacon Loss Event
23/10/13 07:59:25,000 kernel[0]: AirPort: Link Down on en1. Reason 4 (Disassociated due to inactivity).
23/10/13 07:59:25,000 kernel[0]: en1: BSSID changed to 00:00:00:00:00:00
23/10/13 07:59:26,712 racoon[162]: ioctl(SIOCGIFAFLAG_IN6) failed:Can't assign requested address
23/10/13 07:59:26,721 UserEventAgent[13]: Captive: CNPluginHandler en1: Inactive
23/10/13 07:59:26,723 configd[21]: network changed: v4(en1-:10.0.1.3) DNS- Proxy-
23/10/13 07:59:26,728 netbiosd[378]: network_reachability_changed : network is not reachable, netbiosd is shutting down
23/10/13 07:59:26,730 mDNSResponder[66]: DeregisterInterface: Frequent transitions for interface en1 (10.0.1.3)
The connection has to idle only for a few seconds till Mavericks decides to drop it. What can be done against this?

Try going to the Energy Saver preferences in Preferences, and change the "power adapter" sleep settings.
I think Mavericks by default has it go to sleep after about 15 minutes, when before it just powered the screen off.

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