Thank you for bringing this problem to my attention.  I have just altered a
local firewall rule so that traceroute can complete a trace to
cvs.linuxcnc.org.  Here is what the traceroute now looks like from the most
geographically separated system I could access:

$ traceroute -f15 cvs.linuxcnc.org
traceroute to cvs.linuxcnc.org (206.222.212.221), 30 hops max, 38 byte packets
15  ae-3.ebr1.Denver1.Level3.net (4.69.132.58)  45.731 ms  43.883 ms 36.206 ms
16  ge-3-0-0-51.gar1.Denver1.Level3.net (4.68.107.2)  35.167 ms  34.951 ms  
39.032 ms
17  ALLTEL-COMMU.gar1.Denver1.Level3.net (4.79.74.14)  67.851 ms  45.428 ms  
44.913 ms
18  h183.28.213.151.ip.alltel.net (151.213.28.183)  69.774 ms  70.438 ms 69.148 
ms
19  h184.28.213.151.ip.alltel.net (151.213.28.184)  69.398 ms  69.711 ms 69.693 
ms
20  h114.52.170.216.ip.alltel.net (216.170.52.114)  71.635 ms  70.729 ms 71.076 
ms
21  lin-dsl-static-206-222-212-217.inetnebr.com (206.222.212.217) 95.259 ms  
96.217 ms  95.867 ms
22  unpythonic.net (206.222.212.218)  97.637 ms  106.538 ms  95.336 ms
23  cvs.linuxcnc.org (206.222.212.221)  100.587 ms  98.522 ms  99.263 ms

Before this change, the final lines might have looked more like this:
22  unpythonic.net (206.222.212.218)  97.637 ms  106.538 ms  95.336 ms
23  unpythonic.net (206.222.212.218)  100.587 ms !Z  98.522 ms !Z 99.263 ms !Z
because the icmp packets being sent by traceroute were forbidden by the
firewall on 206.222.212.218 to pass to 206.222.212.221.  !Z (!X or !<10> in
some versions of traceroute) indicate that the packet was "administratively
prohibited".  This traceroute output does not indicate an actual problem with
connectivity.

Jeff
PPS I also used www.inoc.net's nettest to check connectivity to
cvs.linuxcnc.org.  Here are its results:

http://www.inoc.net/nettest/?address=206.222.212.221&cmd=traceroute&do=Run+Test
 1  svi10-0.cs0.albyny.inoc.net (64.246.130.2)  1.014 ms  2.251 ms  1.997 ms
 2  svi2-0.cs0.albyny.inoc.net (64.246.129.2)  1.349 ms  1.239 ms  1.485 ms
 3  ge5-2-0.br0.albyny.inoc.net (64.246.128.73)  4.147 ms  0.635 ms  0.605 ms
 4  ge5-1-0.br1.albyny.inoc.net (64.246.128.70)  0.568 ms  0.565 ms  0.550 ms
 5  ge-8-24.car4.NewYork1.Level3.net (4.53.92.13)  7.216 ms  7.072 ms  7.017 ms
 6  vlan89.csw3.NewYork1.Level3.net (4.68.16.190)  7.164 ms  14.546 ms  17.994 
ms
 7  ae-82-82.ebr2.NewYork1.Level3.net (4.69.134.89)  7.473 ms  14.920 ms  
18.144 ms
 8  ae-2.ebr1.Chicago1.Level3.net (4.69.132.65)  28.672 ms  35.127 ms  36.273 ms
 9  ae-68.ebr3.Chicago1.Level3.net (4.69.134.58)  31.642 ms  35.699 ms  34.914 
ms
10  ae-3.ebr2.Denver1.Level3.net (4.69.132.61)  53.356 ms  66.796 ms  51.403 ms
11  ge-5-0-0-56.gar1.Denver1.Level3.net (4.68.107.162)  50.850 ms  50.988 ms  
51.028 ms
12  ALLTEL-COMMU.gar1.Denver1.Level3.net (4.79.74.14)  61.892 ms  63.299 ms  
62.078 ms
13  h183.28.213.151.ip.alltel.net (151.213.28.183)  62.333 ms  62.285 ms  
62.479 ms
14  h184.28.213.151.ip.alltel.net (151.213.28.184)  62.656 ms  63.029 ms  
62.646 ms
15  h114.52.170.216.ip.alltel.net (216.170.52.114)  65.303 ms  62.960 ms  
63.527 ms
16  lin-dsl-static-206-222-212-217.inetnebr.com (206.222.212.217)  89.753 ms  
90.304 ms  89.001 ms
17  unpythonic.net (206.222.212.218)  91.715 ms  92.665 ms  90.981 ms
18  cvs.linuxcnc.org (206.222.212.221)  91.850 ms  92.327 ms  90.911 ms


http://www.inoc.net/nettest/?address=206.222.212.221&cmd=ping&do=Run+Test
PING 206.222.212.221 (206.222.212.221): 56 data bytes
64 bytes from 206.222.212.221: icmp_seq=0 ttl=50 time=95.762 ms
64 bytes from 206.222.212.221: icmp_seq=1 ttl=50 time=90.457 ms
64 bytes from 206.222.212.221: icmp_seq=2 ttl=50 time=93.039 ms
64 bytes from 206.222.212.221: icmp_seq=3 ttl=50 time=91.565 ms
64 bytes from 206.222.212.221: icmp_seq=4 ttl=49 time=92.384 ms

--- 206.222.212.221 ping statistics ---
5 packets transmitted, 5 packets received, 0% packet loss
round-trip min/avg/max/stddev = 90.457/92.641/95.762/1.783 ms


http://www.inoc.net/nettest/?address=206.222.212.221&cmd=loss&do=Run+Test
HOST                                    LOSS  RCVD SENT    BEST     AVG   WORST
svi10-0.cs0.albyny.inoc.net               0%    16   16    1.13    1.47    2.22
svi2-0.cs0.albyny.inoc.net                0%    16   16    1.48    3.15   16.41
ge5-2-0.br0.albyny.inoc.net               0%    16   16    0.74    1.23    6.74
ge5-1-0.br1.albyny.inoc.net               0%    16   16    0.75    0.86    1.46
ge-8-24.car4.NewYork1.Level3.net          0%    16   16    7.05    7.58   12.12
vlan89.csw3.NewYork1.Level3.net           0%    16   16    7.20   11.65   19.14
ae-82-82.ebr2.NewYork1.Level3.net         0%    16   16    7.44   13.28   20.11
ae-2.ebr1.Chicago1.Level3.net             0%    16   16   28.14   35.29   41.32
ae-68.ebr3.Chicago1.Level3.net            0%    16   16   28.53   33.17   42.22
ae-3.ebr2.Denver1.Level3.net              0%    16   16   52.20   59.09   64.85
ge-5-0-0-52.gar1.Denver1.Level3.net       0%    16   16   51.65   53.62   70.59
ALLTEL-COMMU.gar1.Denver1.Level3.net      0%    16   16   62.69   73.62  187.63
h183.28.213.151.ip.alltel.net             0%    16   16   63.06   63.44   64.72
h184.28.213.151.ip.alltel.net             0%    16   16   63.21   63.62   64.25
h114.52.170.216.ip.alltel.net             0%    16   16   63.22   64.44   66.26
lin-dsl-static-206-222-212-217.inetnebr.com    0%    16   16   88.61   90.51   
94.26
unpythonic.net                            0%    16   16   91.81   93.89  100.90
cvs.linuxcnc.org                          7%    15   16   90.20   92.78   96.80

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