Looks like some links are redirected to non-www domain. You should make sure that they are not redirected:
{ [ External links are visible to logged in users only ] }
[[[ 301 Moved Permanently ]]] - 0.01s (0.01 + 0.00) array ( 'date' => 'Wed, 08 May 2013 16:45:02 GMT', 'server' => 'Apache/2.2.24 (Unix) mod_ssl/2.2.24 OpenSSL/1.0.0-fips mod_auth_passthrough/2.1 mod_bwlimited/1.4 FrontPage/5.0.2.2635', 'location' => '[ External links are visible to logged in users only ]', 'content-length' => '274', 'connection' => 'close', 'content-type' => 'text/html; charset=iso-8859-1', 'x_csize' => 274, )