DotNetNuke "Redirection limit for this URL exceeded"
Got this one yesterday when reconfiguring some portals. Solution was that I needed to create the sub directory reflecting the child portal alias I had created. This was not automatically done by DotNetNuke when adding an alias. Thus my alias was www.company.com/iberia and for http://www.company.com/iberia to operate, there should be a folder named iberia with a default.aspx page that performs a redirection into the portal system.