In my views (velocity template mode) I call $Url.Link helper, in Visual Studio with cassini it work but when I deploy my webapp on mono/nginx/ubuntu url are well not formed, I get only the controler's action path.
it's seems it come from Url.For method and its compatibility with monoserv
I remember having to replace the DefaultUrlBuilder to make an app run on mono. I had to override the ConvertRouteParams method to create a Hashtable without the StringComparer.InvariantCultureIgnoreCase. HTH
Checkout line 397: DefaultUrlBuilder