Can't connect to WPA2 networks?

[tpoisot]

I'm using the latest commit on the main branch, and I run 3.13.5-1-ARCH (64 bits). I try to connect with

sudo wifi-menu

I can see the networks, and sometimes I have the ! (existing active connexion) status, but when I try to connect, it doesn't get through. Here is the output of journalctl -xn:

~ $ journalctl -xn
-- Logs begin at jeu 2014-02-20 02:00:59 EST, end at mer 2014-03-05 14:23:51 EST. --
mar 05 14:23:47 billybumbler kernel: RTL8723AU: ERROR indicate disassoc
mar 05 14:23:48 billybumbler kernel: RTL8723AU: ERROR set bssid:00:00:00:00:00:00
mar 05 14:23:48 billybumbler kernel: [84B blob data]
mar 05 14:23:48 billybumbler kernel: RTL8723AU: ERROR indicate disassoc
mar 05 14:23:48 billybumbler network[7077]: Failed to bring the network up for profile 'wlan0-MyLittleWifi'
mar 05 14:23:48 billybumbler systemd[1]: netctl@wlan0\x2dMyLittleWifi.service: main process exited, code=exited, status=1/FAILURE
mar 05 14:23:48 billybumbler systemd[1]: Failed to start Networking for netctl profile wlan0-MyLittleWifi.
-- Subject: L'unité (unit) netctl@wlan0\x2dMyLittleWifi.service a échoué
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- L'unité (unit) netctl@wlan0\x2dMyLittleWifi.service a échoué, avec le résultat failed.
mar 05 14:23:48 billybumbler systemd[1]: Unit netctl@wlan0\x2dMyLittleWifi.service entered failed state.
mar 05 14:23:48 billybumbler sudo[6988]: pam_unix(sudo:session): session closed for user root
mar 05 14:23:51 billybumbler kernel: RTL8723AU: ERROR nolinked power save enter

What kind of diagnosis should I run?