Description:

I have a WNA1100 WiFi dongle:
ID 0846:9030 NetGear, Inc. WNA1100 Wireless-N 150 [Atheros AR9271] (ath9k_htc)
Sometimes while I'm playing, my Internet connection is broken.
When I'm disconnected, I need to reboot my computer. If not, I'm unable to connect to my Internet box.
journalctl gives me many errors (cf log file).

This bug started 20 days ago when I updated following packages:
[2013-01-08 13:25] Running 'pacman-color -Syu'
[2013-01-08 13:25] synchronizing package lists
[2013-01-08 13:25] starting full system upgrade
[2013-01-08 13:25] upgraded cronie (1.4.9-1 -> 1.4.9-2)
[2013-01-08 13:25] upgraded desktop-file-utils (0.20-1 -> 0.21-1)
[2013-01-08 13:25] upgraded dhcpcd (5.6.3-2 -> 5.6.4-1)
[2013-01-08 13:25] upgraded iptables (1.4.16.2-1 -> 1.4.16.3-1)
[2013-01-08 13:25] upgraded mpfr (3.1.1.p2-1 -> 3.1.1.p2-2)
[2013-01-08 13:25] upgraded nss (3.14.1-1 -> 3.14.1.1.93-1)
[2013-01-08 13:25] upgraded pango (1.32.4-1 -> 1.32.5-1)

Additional info:

* package version(s)
linux 3.7.4-1
dhcpcd 5.6.4-1

Steps to reproduce:

Hard to reproduce because it's very random. But it happens one time per day.

I opened a topic when I was with 3.6.11 kernel: https://bbs.archlinux.org/viewtopic.php?pid=1217830