This should probably have been expected, but it was the only thing that fouled me up in moving my app from beta1 to beta2.

The default names space for flex has changed from “http://www.macromedia.com/2005/mxml” to “http://www.adobe.com/2006/mxml”. This signifies both the company change and the year change.

In compiling with the SDK on my Mac this was the only change I needed to make to be up to date with the software. So your hello world application is now going to look like: