When using a CNAME to access the site, the "Repositories" drop-down list in the main-nav will sometimes include the username in the path for the repo urls.

=== Replication: ===

Go to homepage via CNAME (http://hg.mclanahan.org/).

Repo URLs are correct (http://hg.mclanahan.org/p3pi-dev/)

Click "Help" in the main-nav

Repo links under "Repositories" now have the username in the url path (http://hg.mclanahan.org/pmclanahan/p3pi-dev/), which throws a 404.