weird firefox behaviour

[Thomas Klausner <wiz%NetBSD.org@localhost>]

Recently I've updated from 5.99.10 to 5.99.11; I think that was the
point that firefox (3.0.8 at that point; 3.0.9 has the same behaviour)
stopped reacting to some webpages.

In particular, sadly, this includes "www.netbsd.org" and
"www.freebsd.org", not "www.openbsd.org". When I type that name into
the address bar, it says "Connecting to www.netbsd.org" in the status
bar for a _very_ short time, then says "Done" but doesn't display
anything. If I was at a different webpage before I typed the address,
it is still shown (the address bar contains the address I typed
though).

# host www.netbsd.org
www.netbsd.org has address 204.152.190.12
www.netbsd.org has IPv6 address 2001:4f8:3:7:2e0:81ff:fe52:9a6b
www.netbsd.org mail is handled by 10 mail.netbsd.org.
# host www.freebsd.org
www.freebsd.org has address 69.147.83.33
www.freebsd.org has IPv6 address 2001:4f8:fff6::21
www.freebsd.org mail is handled by 0 .
# host www.openbsd.org
www.openbsd.org has address 129.128.5.191

I wonder if the reason has something to do with IPv6?
And/or perhaps the bind update?

I haven't configured IPv6 here.

Anyone else seen this? Ideas?
 Thomas