Hi!

Just to confirm such kind of problems, in my case a stf0 device
(pkgsrc/net/hf6to4) based on a pppoe0 connection is involved. This
stf0 machine does no longer send any ipv6 packets out to the stf0
device nor to the internal LAN, though all relevant network devices
have ipv6 addresses as before:

  http://mail-index.netbsd.org/source-changes/2006/01/21/0000.html

Reverting these changes (even with newer other -current stuff) make
all ipv6 work again (for my config).

Any other information I can provide?

Markus.