Disclaimer The opinions expressed herein are my own personal opinions and do not represent my employer's view in anyway.
Microsoft have release ASP.Net MVC RC 1 last week - twice. The first release was quickly refreshed to fix some issues so if you downloaded early last week, you may need to get the download again. Check here.
I have had a quick attempt to upgrade my 1 project and it all worked pretty sweetly and the upgrade process was very SIMPLE.
However. Several of my crud views use FckEditor for long text fields. A post-pack of these views triggers page validation:
A potentially dangerous Request.Form value was detected from the client
Normally, turing off page request validation in the page and / or web.config will fix this :
<
but for me and others (see comments at Phil Haack link above) this does not help.
So, looks like I will be rolling back to the beta until this is resolved.
Update:
RTFB! http://haacked.com/archive/2009/02/07/take-charge-of-your-security.aspx. I haven't tried this yet, but it is almost certainly the solution.