> It looks like IPv6 PMTUD is not working correctly. This is on
> NetBSD 2.0F i386. But it also happens on -stable.

	it works fine for me.  don't you have ipf/whatever configured?

2001:240:501:0:206:29ff:fe8f:b201  fe80::2a0:deff:fe06:e177%wm0   UGHD        2     6179   1280  wm0

% traceroute6 -q1 coconut
traceroute6: Warning: coconut.itojun.org has multiple addresses; using 2001:240:501:2:240:26ff:fec0:ae56
traceroute6 to coconut.itojun.org (2001:240:501:2:240:26ff:fec0:ae56) from 2001:240:500:1:209:6bff:fefa:6f49, 64 hops max, 12 byte packets
 1  2001:240:0:200:2a0:deff:fe06:e177  2.112 ms
 2  kabe.iijlab.net  1.548 ms
 3  otm6-gate2.IIJ.Net  2.053 ms
 4  otm6-gate0.IIJ.Net  2.084 ms
 5  sh3.iijlab.net  2.35 ms
	| MTU=1280
 6  garlic  4.161 ms
 7  2001:240:501:2:240:26ff:fec0:ae56  8.3 ms
% uname -a
NetBSD starfruit.itojun.org 2.0F NetBSD 2.0F (STARFRUIT) #621: Tue Jun  1 14:06:30 JST 2004  itojun@starfruit.itojun.org:/home/itojun/NetBSD/src/sys.pf/arch/i386/compile/STARFRUIT i386