I keep seeing this problem since 4.x
My workaround is to not use the Default.aspx that comes with the new releases.
Haven't had any problems using the old Default.aspx pages.
Since I keep having this problem and forget how I fixed it, I decided to put this DotNetNuke Redirect Loop solution here.
If there is a better way, please advise. I've seen a whole bunch of solutions that don't work. chowell@ nwds-ak.com
Alternate Solutions to Consider