Rails url helpers in subdomains - remove the subdomain

A user on my site can have a subdomain. So for example, their page url is ``` name.example.com ``` Logged in users are able to view more user information so on the user's show page, I have a link that is generated with the following code: ``` user_url(@user, :subdomain => false) ``` This link should generate the following url (where @user has an ID of 19) ``` example.com/users/19 ``` When I hover over the link, all looks good (i.e., in the bottom of the browser window, both Safari and FF show the link correctly.) Problem is when I click the link, the site raises a 404 and the url is: ``` example.com/users/19 ``` Anyone know what happened to the slash between com and users and how do I get it back? BTW, Rails 3.2 and everything works in development. This issue only arises in production.