I have a repeatable bug which results in the total crash of the system. I am using Ubuntu 10.10 and when it crashes, the mouse is still active but you can choose no other window (Gmail or anything else). Netbeans also fails to respond. The only way out is to press the power off button and restart the computer.

It is easy to duplicate the bug and it is 100% reproducible. Choose New Project, Java Desktop Application. I am aware that the desktop application is no longer in development, but this is the easiest way to duplicate the bug and I don't think it is connected to the desktop application as such.
Give it a name like "crash", or anything else.

Once you see the CrashView, drag over a Combo box and put it on the form. Right click on it and add Event -> Action -> Action performed. It will switch to the source view. Put any code you like in the event:

	private void jComboBox1ActionPerformed(java.awt.event.ActionEvent evt) {                                           
		int i = 0;
		i++;
	}                                          

Put a breakpoint on the first line. Click on the combo box to activate the debugger. CRASH! You are dead. Hit the power button and reboot.