bitquabit - Zombie Operating Systems and ASP.NET MVC
That is M$ backwards compatibility for you! LOL.
Funny, and sad... "And that is why, in 2009, when developing in Microsoft .NET 3.5 for ASP.NET MVC 1.0 on a Windows 7 system, you cannot include /com\d(\..*)?, /lpt\d(\..*)?, /con(\..*)?, /aux(\..*)?, /prn(\..*)?, or /nul(\..*)? in any of your routes."
HotmaASP.NET for web designers: Introduction