starting jails hangs during boot

[Mickey Harvey]

When I boot up my host rc hangs at "starting jails:" indefinitely. If i
Control^C during the hang boot continues as usual so I login ,run jls and
the jail appears to have started correctly. I can login to the jail as usual
using "jexec 1 sh". I'm using 8.2-RELEASE i386 on a VirtualBox VM. My rc is
set up as follows:

ifconfig_em0="DHCP"
ifconfig_em0_alias0="10.0.2.16 netmask 255.255.255.255"
jail_enable="YES"
jail_list="www"
jail_www_rootdir="/usr/local/
jails/www"
jail_www_hostname="www"
jail_www_ip="10.0.2.16"
jail_www_devfs_enable="YES"