Eu enfrentei o mesmo problema. Também parece que esse problema ocorre apenas se você usar cabeçalhos de host. Se você está enfrentando o mesmo problema e está usando cabeçalhos de host, verifique esta postagem. Espero que ajude você.
My problem
After creating my new Web Application and a new SiteCollection with the url “partner.solutions2share.net” i tried to access my new site.
But there is a problem with the login. After three tries to access the site i only got a blank site.The solution
You have to add a new Multi-String registry key named “BackConnectionHostNames” in SharePoint server at HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa\MSV1_0 and set the host names with values (for example “partner.solutions2share.intern").
- Start, click Run, type “regedit”, and then click OK.
- Locate the following registry key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa\MSV1_0
- Right click on MSV1_0, go to New, and then click Multi-String Value.
- Type “BackConnectionHostNames”, and then press ENTER.
- Right click on the value “BackConnectionHostNames”, and then click Modify.
- In the “value data” box, type the host names (for example “partner.solutions2share.intern”) for the sites, and then click OK.
- Quit Registry Editor, and then run an iisreset
Finally navigate to your url and it will work.
MSDN Reference : http://support.microsoft.com/kb/896861/en-us