I have 4.8.0 installed on Godaddy hosting.  Install and everything else went fine.  When I installed it I installed it under a domain name I used for testing as my real domain name had not yet transferred over to GoDaddy yet.  After my real domain name came across I changed domain names with GoDaddy for my  hosting and now I cannot access my site.  I made sure I had my alias in the DNN portal before doing this and cannot get at it.  Is there another place I need to change this within DNN?  I noticed under Admin>Site Settings the Site Map URL still has the test domain so something must be still pointing to the old domain name.

Technically I don't get an error.  When I navigate to the actual site www.domainname.com/1/ I get my parked page. (GoDaddy won't let you install DNN in the root directory).  But when I navigated to www.testdomainname.com/1/ it worked just fine.  I will have to check with GoDaddy on the IIS Header stuff.

Thanks Mitch.  I will also check that too and let you know my findings.