Tem algo a ver com cookies de sessão e como o site lida com eles.
Primeira passagem, nenhum cookie de sessão no meu final,
$ wget --load-cookies cookies --save-cookies cookies --keep-session-cookies -S http://motherscarehawaii.teamvision.biz/
--2011-07-21 21:37:05-- http://motherscarehawaii.teamvision.biz/
Resolving motherscarehawaii.teamvision.biz (motherscarehawaii.teamvision.biz)... 206.72.120.169
Connecting to motherscarehawaii.teamvision.biz (motherscarehawaii.teamvision.biz)|206.72.120.169|:80... connected.
HTTP request sent, awaiting response...
HTTP/1.1 500 Internal Server Error
Cache-Control: private
Content-Type: text/html
Server: Microsoft-IIS/7.5
Set-Cookie: ASPSESSIONIDASCRDQBC=GAONOAEADFONKBABDHPPMCLG; path=/
X-Powered-By: ASP.NET
Date: Thu, 21 Jul 2011 20:36:51 GMT
Connection: keep-alive
Content-Length: 1208
2011-07-21 21:37:05 ERROR 500: Internal Server Error.
segunda passagem, agora carrega o cookie do arquivo,
$ wget --load-cookies cookies --save-cookies cookies --keep-session-cookies -S http://motherscarehawaii.teamvision.biz/
--2011-07-21 21:37:06-- http://motherscarehawaii.teamvision.biz/
Resolving motherscarehawaii.teamvision.biz (motherscarehawaii.teamvision.biz)... 206.72.120.169
Connecting to motherscarehawaii.teamvision.biz (motherscarehawaii.teamvision.biz)|206.72.120.169|:80... connected.
HTTP request sent, awaiting response...
HTTP/1.1 200 OK
Cache-Control: private
Content-Length: 2843
Content-Type: text/html
Server: Microsoft-IIS/7.5
X-Powered-By: ASP.NET
Date: Thu, 21 Jul 2011 20:36:53 GMT
Connection: keep-alive
Length: 2843 (2.8K) [text/html]
Saving to: 'index.html'
100%[=======================================================================================================>] 2,843 --.-K/s in 0.1s
2011-07-21 21:37:07 (24.1 KB/s) - 'index.html' saved [2843/2843]
Espero que ajude você a rastreá-lo ainda mais.