Is this still a problem?

Using Hurricane Electric's looking glass (http://lg.he.net), it all seems to look fine.

From HE looking glass to 2001:67c:1562::/47 (US):

| core1.fmt1.he.net> traceroute ipv6 2001:67c:1562::15 numeric
| Hop	Packet 1	Packet 2	Packet 3	Hostname
| 1	49 ms	<1 ms	<1 ms	10ge11-1.core1.sjc2.he.net (2001:470:0:2f::2)
| 2	22 ms	42 ms	21 ms	sjo-b21-link.telia.net (2001:2000:3080:1b7::1)
| 3	89 ms	91 ms	101 ms	bost-b1-v6.telia.net (2001:2000:3018:84::1)
| 4	95 ms	105 ms	95 ms	internap-ic-304640-bost-b1.c.telia.net (2001:2000:3080:93b::2)
| 5	99 ms	105 ms	95 ms	mpr1-bbnet2.bsn004.pnap.net (2600:c0d:0:102:0:4:2:1)
| 6	142 ms	105 ms	99 ms	2600:c0d:4002:3::2
| 7	102 ms	95 ms	91 ms	likho.canonical.com (2001:67c:1562::15)

| core1.sjc1.he.net> traceroute ipv6 2001:67c:1562::15 numeric
| Hop	Packet 1	Packet 2	Packet 3	Hostname
| 1	19 ms	<1 ms	<1 ms	10ge4-4.core1.sjc2.he.net (2001:470:0:55::2)
| 2	21 ms	24 ms	1 ms	sjo-b21-link.telia.net (2001:2000:3080:1b7::1)
| 3	98 ms	90 ms	101 ms	bost-b1-v6.telia.net (2001:2000:3018:84::1)
| 4	97 ms	99 ms	100 ms	internap-ic-304640-bost-b1.c.telia.net (2001:2000:3080:93b::2)
| 5	99 ms	99 ms	100 ms	mpr1-bbnet1.bsn004.pnap.net (2600:c0d:0:101:0:4:2:1)
| 6	100 ms	97 ms	151 ms	2600:c0d:4002:3::2
| 7	84 ms	75 ms	74 ms	likho.canonical.com (2001:67c:1562::15)

From HE looking glass to 2001:67c:1360::/48 (EU):

| core1.fmt1.he.net> traceroute ipv6 2001:67c:1360:8c01::18 numeric
| Hop	Packet 1	Packet 2	Packet 3	Hostname
| 1	20 ms	27 ms	21 ms	10ge11-1.core1.sjc2.he.net (2001:470:0:2f::2)
| 2	12 ms	4 ms	20 ms	level3.v310.core1.sjc2.he.net (2001:470:0:203::2)
| 3	14 ms	95 ms	28 ms	vl-90.edge1.SanJose1.Level3.net (2001:1900:1a:8::8)
| 4	*	*	85 ms	2001:1900:4:1::5e
| 5	135 ms	195 ms	147 ms	vl-4086.edge3.London1.Level3.net (2001:1900:6:1::11)
| 6	151 ms	148 ms	147 ms	vl-51.edge5.London1.Level3.net (2001:1900:101:1::a)
| 7	136 ms	133 ms	142 ms	SOURCE-MANA.edge5.London1.Level3.net (2001:1900:5:2:2::131a)
| 8	148 ms	150 ms	148 ms	obake.canonical.com (2001:67c:1360:8c01::18)

| core1.sjc1.he.net> traceroute ipv6 2001:67c:1360:8c01::18 numeric
| Hop	Packet 1	Packet 2	Packet 3	Hostname
| 1	32 ms	24 ms	24 ms	10ge4-4.core1.sjc2.he.net (2001:470:0:55::2)
| 2	34 ms	33 ms	24 ms	level3.v310.core1.sjc2.he.net (2001:470:0:203::2)
| 3	10 ms	<1 ms	<1 ms	vl-90.edge1.SanJose1.Level3.net (2001:1900:1a:8::8)
| 4	*	*	*	?
| 5	156 ms	159 ms	149 ms	vl-4086.edge3.London1.Level3.net (2001:1900:6:1::11)
| 6	159 ms	150 ms	149 ms	vl-51.edge5.London1.Level3.net (2001:1900:101:1::a)
| 7	149 ms	186 ms	164 ms	SOURCE-MANA.edge5.London1.Level3.net (2001:1900:5:2:2::131a)
| 8	148 ms	149 ms	149 ms	obake.canonical.com (2001:67c:1360:8c01::18)

From HE to 2001:67c:1560/47 (EU):

| core1.fmt1.he.net> traceroute ipv6 2001:67c:1560:8001::11 numeric
| Hop	Packet 1	Packet 2	Packet 3	Hostname
| 1	23 ms	23 ms	31 ms	10ge11-1.core1.sjc2.he.net (2001:470:0:2f::2)
| 2	8 ms	107 ms	24 ms	level3.v310.core1.sjc2.he.net (2001:470:0:203::2)
| 3	18 ms	22 ms	24 ms	vl-60.edge1.SanJose1.Level3.net (2001:1900:1a:5::8)
| 4	*	*	92 ms	2001:1900:4:1::5e
| 5	144 ms	134 ms	145 ms	vl-4086.edge3.London1.Level3.net (2001:1900:6:1::11)
| 6	172 ms	146 ms	134 ms	vl-51.edge5.London1.Level3.net (2001:1900:101:1::a)
| 7	141 ms	141 ms	145 ms	SOURCE-MANA.edge5.London1.Level3.net (2001:1900:5:2:2::131a)
| 8	149 ms	208 ms	161 ms	steelix.canonical.com (2001:67c:1560:8001::11)

| core1.sjc1.he.net> traceroute ipv6 2001:67c:1560:8001::11 numeric
| Hop	Packet 1	Packet 2	Packet 3	Hostname
| 1	48 ms	22 ms	25 ms	10ge4-4.core1.sjc2.he.net (2001:470:0:55::2)
| 2	24 ms	14 ms	24 ms	level3.v310.core1.sjc2.he.net (2001:470:0:203::2)
| 3	10 ms	1 ms	1 ms	vl-60.edge1.SanJose1.Level3.net (2001:1900:1a:5::8)
| 4	80 ms	98 ms	83 ms	2001:1900:4:1::5e
| 5	193 ms	181 ms	148 ms	vl-4086.edge3.London1.Level3.net (2001:1900:6:1::11)
| 6	160 ms	150 ms	149 ms	vl-51.edge5.London1.Level3.net (2001:1900:101:1::a)
| 7	150 ms	149 ms	150 ms	SOURCE-MANA.edge5.London1.Level3.net (2001:1900:5:2:2::131a)
| 8	150 ms	149 ms	150 ms	steelix.canonical.com (2001:67c:1560:8001::11)

archive.ubuntu.com includes *only* servers in our UK datacentres.

us.archive.ubuntu.com includes *only* servers in our US datacentres.

security.ubuntu.com includes *both* servers in the our UK and US datacentres.