Memory leak in 80211node on FreeBSD 7.1-BETA2

[Jok]

# uname -a
FreeBSD right.frequency.dk 7.1-BETA2 FreeBSD 7.1-BETA2 #0: Sun Oct 12
20:59:28 UTC 2008
root at driscoll.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC  amd64

# vmstat -m
Type InUse MemUse HighUse Requests  Size(s)
<snip>
80211node 17716 212570K       -    20452  16,1024

The only related things I can find are links from 2005 and 2006 for FreeBSD 6.0.

Anyone who knows how to fix it?