It looks like the ASP.NET MVC team have changed the way model validation will work for the upcoming version 2 of the MVC framework. This was totally in response to user feedback on Twitter and various blog posts, and while it’s a good change in itself, it’s pretty remarkable for a couple of reasons.

1 – It shows Microsoft are really listening to people these days

2 – The change seems to have been implemented in less than a week – even if it’s a fairly simple change, that’s still a pretty good turnaround time for what is a fairly major component of ASP.NET MVC 2.

Here’s Scott Gu’s post http://twitter.com/scottgu/statuses/8097596794

And here’s Ayende’s take on the original issue http://ayende.com/Blog/archive/2010/01/21/when-the-design-violates-the-principle-of-least-surprise-you.aspx which, as (almost) always, seems to make a lot of sense.