Build: NetBeans IDE 7.3 Beta (Build 201209232010)
VM: Java HotSpot(TM) 64-Bit Server VM, 20.10-b01-428, Java(TM) SE Runtime Environment, 1.6.0_35-b10-428-11M3811
OS: Mac OS X

User Comments:
ytn01: Opened an existing JFrame form file from a project, the form previously had 2 JButtons & 2 JLabels.
Pressed ctrl+A, selecting all components & pressed "delete",... (this didn't delete anything because the base JFrame was also selected, and is undeletable)
Selected the 2buttons & 2labels via mouse drag & pressed "delete" key,... they were deleted
Dragged a JMenuBar from the pallete to area outside of the form (white space),.... MenuBar was added to "Other components" of the form
Tried to drag the JMenuBar from "Other Components" area to the Form Designer,... nothing happened,
Dragged the JMenuBar from "Other Components" area to the JFrame node of the Navigator window,... MenuBar become subnode of JFrame

and exception got thrown.

GUEST: Acabei de abrir o NETBEANS e ele fica consumindo muito processamento e rede, fica muito ruim trabalhar




Stacktrace: 
java.lang.NullPointerException
   at javax.swing.plaf.basic.BasicTreeUI$Handler.handleSelection(BasicTreeUI.java:3504)
   at javax.swing.plaf.basic.BasicTreeUI$Handler.mouseReleasedDND(BasicTreeUI.java:3574)
   at javax.swing.plaf.basic.BasicTreeUI$Handler.mouseReleased(BasicTreeUI.java:3562)
   at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:272)
   at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:272)
   at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:272)