level3.net in Chicago - high packet loss?!?

[Network Fortius <netfortius () gmail com>]

Anybody having any idea why such a high packet loss on lever3's  
network, in Chicago?

Stef:~ scm$ mtr -r www.yahoo.com
...
tbr1-p010802.cgcil.ip.att.net             0%    16   16   15.12    
24.21   49.26
ggr2-p310.cgcil.ip.att.net                0%    16   16   13.18    
42.66  118.99
so-1-1-0.edge1.chicago1.level3.net        0%    16   16   14.48    
35.84  126.48
so-2-1-0.bbr1.chicago1.level3.net        63%     6   16   14.44    
43.74   79.97
                                                                  
^^^^^^^
as-1-0.bbr2.sanjose1.level3.net           0%    16   16   61.95    
80.64  176.01
ge-10-2.ipcolo3.sanjose1.level3.net       0%    16   16   63.37    
95.61  148.46
unknown.level3.net                        0%    16   16   63.34    
86.46  168.62
unknown-66-218-82-217.yahoo.com           0%    16   16   62.09    
88.91  127.58
p4.www.scd.yahoo.com                      0%    16   16   64.51    
89.96  183.79

TIA,
Stef
Network Fortius, LLC