FB3 Beta 2 Design View not showing up? Quick "Fix"

If you're using FB3 Beta 2, I bet you've opened up an MXML document in design view and it didn't show up at least once? A quick (stupid) fix is as follows:

Go to source view.
In your root tag add a space before the namespace url
<mx:Canvas xmlns:mx="http://www.adobe.com/2006/mxml"
Becomes
<mx:Canvas xmlns:mx=" http://www.adobe.com/2006/mxml"

Now, delete that space.
Back to
<mx:Canvas xmlns:mx="http://www.adobe.com/2006/mxml"

And save, you'll notice a weird redraw issue.

Now hit the design button and you should see your form.