I'm using the WordPress 3.5 Release Candidate version. I did a subdirectory install of WP (in folder WPFOLDER) and then turned on the Multisite mode and created a child site in the network. Both the "homesite" and "childsite" WordPress sites were accessible at their respective URLs, e.g.,
(BTW, "homesite" and "childsite" are merely sample names.)
No problem at this point. I then followed the instructions for the MU Domain Parking plugin (adding childsite as a Parked Domain with my host) and then was also successfully able to access the child WordPress site via the URL:
Everything seems nice at this point. BUT, with the MU Domain Parking plugin activated, I can't access my home site at:
due to an infinite redirection problem. Firefox says: "Firefox has detected that the server is redirecting the request for this address in a way that will never complete" and returns the URL:
If I deactivate the MU Domain Parking plugin, then I can again access my WordPress site at http://www.homesite.com with no problem.
Given that the issue starts and stops as I activate/deactivate the plugin, it seems to be a plugin issue.