Seemed to happen randomly in 080519. Sample userdir, no databases configured, only GFv2 configured. I had just pressed
Next in the web app wizard to go to the final (frameworks) panel when the IDE froze.
Created attachment 61719 [details]
Maybe not so random. Happened to me again. I just:
1. ant testuserdir-delete tryme
2. C-S-N, select Web App
3. On panel to select server, there are none yet, so Add, select GFv2, point to my local GFv2 installation, close
4. Next until IDE freezes.
*** This issue has been marked as a duplicate of 135206 ***