[pudgeball]

This may help, this may not help but I'll say it anyhow. I had updated my dev computer to the 2012 updates, however I needed to work with a cRIO that I wasn't able to update at the time. So I downgraded to the 2011 update and it still didn't want to work. In the end I got it working with some prodding.

To get it to work, I uninstalled the plugins, then closed netbeans, then found where the wpilibj was installed (in my case, C:\Users\Nick\sunspotfrcsdk) and deleted that folder. I then installed the plugins again and it worked. Yes my case is different than yours but doing this may help you out.