Play framework + Netbeans 7, unable to expand project node!

Question

I'm using Play 1.2.1, and have netbeansified a project, and opened the project in Netbeans 7. I am able to open and run the project, but the Projects sidebar won't allow me to open/expand the project node, so I can view the project folders.

Any ideas what might be wrong?

I'm using Mac OS X 10.6.