<p>I just recently installed the MVC beta.
However, I assumed because the versioning numbers have changed and because it now uses the GAC instead of the bin folder that it wouldn't break existing applications.</p>

<p>However, it has.</p>

<p>What steps do I need to follow to ensure my existing preview 3 applications use a bin copy of the .dlls and are not broken by the installation of the beta?</p>

ASP.NET MVC beta is also bin-deployable, Move the following DLL's from GAC to the bin folder of your app
```
```
* System.Web.Mvc
* System.Web.Routing
* System.Web.Abstractions
```
```
Check this article for more information