Wifi disconnects every so often with Broadcom BCM4331, even with 13.04.

Wifi disconnects every so often with Broadcom BCM4331, even with 13.04.

My wifi connection drops about every few minutes or so, and the only way to reconnect is to disable wireless, reenable it, and reconnect. As you can imagine, this is really annoying.
There are similar questions to this one, but the solutions they offer are to install Ubuntu 13.04, which I'm already running.
└─>lspci | grep 802
03:00.0 Network controller: Broadcom Corporation BCM4331 802.11a/b/g/n (rev 02)

└─>lsmod | grep b43
b43                   378642  0
mac80211              606457  2 b43,zd1211rw
cfg80211              510937  3 b43,mac80211,zd1211rw
ssb                    56986  1 b43
bcma                   41051  1 b43