Created attachment 102685 [details]
Thread dump of blocked NB
In NetBeans 6.9.1 I double-clicked on a component that extends JPanel and I got stuck on a deadlock between these two threads:
- AWT thread, name is "AWT-EventQueue-1"
- a RequestProcessor thread, name is "GUI Builder"
Attached there is thread dump saved with JVisualVM.
This is a temporary problem of JDK. You should use either JDK 6 update 20 or JDK 6 update 23 (there is a bug in updates 21 and 22).
*** This bug has been marked as a duplicate of bug 187697 ***