I did a search and didn't notice any comments on this. I did a build with the updates from this evening and get this error when I try to drag a portlet around in the portal demo.
I tried rebuilding my copy but the problem remains.Code:
this.dom.parentNode has no properties
var shim = Ext.get(this.dom.parentNode.insertBefore(el, this.dom));
ext-all-debug.js (line 3545)