syslogd starting before IPv6 network is up

I migrated one of my 8-CURRENT (Thu May 21) box to IPv6 and since then, I
get the following message at boot:

syslogd: bind: Can't assign requested address
syslogd: bind: Can't assign requested address
syslogd:
child pid 250 exited with return code 1

and syslogd obviously fails to start. Apparently this problem has been
reported before, but no actual solution other than start syslogd from
rc.local was given.

Here's my rcorder /etc/rc.d/* if it helps:

/etc/rc.d/dumpon
/etc/rc.d/ddb
/etc/rc.d/initrandom
/etc/rc.d/geli
/etc/rc.d/gbde
/etc/rc.d/encswap
/etc/rc.d/ccd
/etc/rc.d/swap1
/etc/rc.d/early.sh
/etc/rc.d/fsck
/etc/rc.d/root
/etc/rc.d/hostid
/etc/rc.d/mdconfig
/etc/rc.d/mountcritlocal
/etc/rc.d/zfs
/etc/rc.d/FILESYSTEMS
/etc/rc.d/var
/etc/rc.d/cleanvar
/etc/rc.d/random
/etc/rc.d/adjkerntz
/etc/rc.d/atm1
/etc/rc.d/hostname
/etc/rc.d/ipfilter
/etc/rc.d/ipnat
/etc/rc.d/ipfs
/etc/rc.d/kldxref
/etc/rc.d/sppp
/etc/rc.d/addswap
/etc/rc.d/auto_linklocal
/etc/rc.d/sysctl
/etc/rc.d/serial
/etc/rc.d/netif
/etc/rc.d/ip6addrctl
/etc/rc.d/atm2
/etc/rc.d/pfsync
/etc/rc.d/pflog
/etc/rc.d/pf
/etc/rc.d/ppp
/etc/rc.d/routing
/etc/rc.d/ip6fw
/etc/rc.d/network_ipv6
/etc/rc.d/devd
/etc/rc.d/ipsec
/etc/rc.d/ipfw
/etc/rc.d/nsswitch
/etc/rc.d/resolv
/etc/rc.d/mroute6d
/etc/rc.d/route6d
/etc/rc.d/mrouted
/etc/rc.d/routed
/etc/rc.d/defaultroute
/etc/rc.d/netoptions
/etc/rc.d/NETWORKING
/etc/rc.d/mountcritremote
/etc/rc.d/devfs
/etc/rc.d/ipmon
/etc/rc.d/mdconfig2
/etc/rc.d/newsyslog
/etc/rc.d/syslogd
/etc/rc.d/savecore
/etc/rc.d/ldconfig
/etc/rc.d/archdep
/etc/rc.d/abi
/etc/rc.d/SERVERS
/etc/rc.d/named
/etc/rc.d/ntpdate
/etc/rc.d/rpcbind
/etc/rc.d/nisdomain
/etc/rc.d/ypserv
/etc/rc.d/ypxfrd
/etc/rc.d/ypupdated
/etc/rc.d/ypbind
/etc/rc.d/ypset
/etc/rc.d/yppasswdd
/etc/rc.d/wpa_supplicant
/etc/rc.d/accounting
/etc/rc.d/nfsclient
/etc/rc.d/amd
/etc/rc.d/atm3
/etc/rc.d/auditd
/etc/rc.d/tmp
/etc/rc.d/cleartmp
/etc/rc.d/dmesg
/etc/rc.d/ipxrouted
/etc/rc.d/kerberos
/etc/rc.d/kadmind
/etc/rc.d/keyserv
/etc/rc.d/kpasswdd
/etc/rc.d/gssd
/etc/rc.d/quota
/etc/rc.d/nfsserver
/etc/rc.d/mountd
/etc/rc.d/nfsd
/etc/rc.d/statd
/etc/rc.d/lockd
/etc/rc.d/pppoed
/etc/rc.d/pwcheck
/etc/rc.d/virecover
/etc/rc.d/DAEMON
/etc/rc.d/watchdogd
/etc/rc.d/ugidfw
/etc/rc.d/timed
/etc/rc.d/apm
/etc/rc.d/apmd
/etc/rc.d/bootparams
/etc/rc.d/hcsecd
/etc/rc.d/bthidd
/etc/rc.d/local
/etc/rc.d/lpd
/etc/rc.d/motd
/etc/rc.d/mountlate
/etc/rc.d/nscd
/etc/rc.d/ntpd
/etc/rc.d/powerd
/etc/rc.d/rarpd
/etc/rc.d/sdpd
/etc/rc.d/rfcomm_pppd_server
/etc/rc.d/rtadvd
/etc/rc.d/rwho
/etc/rc.d/LOGIN
/etc/rc.d/syscons
/etc/rc.d/sshd
/etc/rc.d/sendmail
/etc/rc.d/cron
/etc/rc.d/jail
/etc/rc.d/localpkg
/etc/rc.d/securelevel
/etc/rc.d/power_profile
/etc/rc.d/othermta
/etc/rc.d/natd
/etc/rc.d/msgs
/etc/rc.d/moused
/etc/rc.d/mixer
/etc/rc.d/inetd
/etc/rc.d/idmapd
/etc/rc.d/hostapd
/etc/rc.d/geli2
/etc/rc.d/ftpd
/etc/rc.d/ftp-proxy
/etc/rc.d/dhclient
/etc/rc.d/bsnmpd
/etc/rc.d/bridge
/etc/rc.d/bluetooth
/etc/rc.d/bgfsck

Although it would seem syslogd should start after network_ipv6, it is not
actually the case during the boot.

I'll be glad to test any suggestions,
Nicolas.