Product Version: NetBeans IDE Dev (Build 20090210055708)
Java: 1.6.0_10; Java HotSpot(TM) Client VM 11.0-b15
System: Linux version 2.6.27-7-generic running on i386; UTF-8; en_US (nb)

In the project properties select node Build>Compile. The panel contains following a11y problems:

 No Accessible description :
   Class: javax.swing.JButton {  Manage Java Platfroms... |  } 
   Class: javax.swing.JButton {  Set up external Maven home |  } 

 Components with no LABEL_FOR pointing to it :
   Class: org.openide.explorer.view.TreeView$ExplorerTree {  Properties Category |  N/A } 

 Components with no mnemonic :
   Class: javax.swing.JButton {  Manage Java Platfroms... |  } 
   Class: javax.swing.JButton {  Set up external Maven home |  }