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This bug was originally marked as duplicate of bug 218719, that is already resolved. This bug is still valid, so this seems to be another bug, but it might be related. Build: NetBeans IDE 7.3 Beta (Build 201210011125) VM: Java HotSpot(TM) 64-Bit Server VM, 23.3-b01, Java(TM) SE Runtime Environment, 1.7.0_07-b11 OS: Windows 7 User Comments: GUEST: Just opening the IDE GUEST: ????????? Stacktrace: java.lang.NullPointerException at org.netbeans.modules.autoupdate.ui.SettingsTab$Listener.prepareContent(SettingsTab.java:468) at org.netbeans.modules.autoupdate.ui.SettingsTab$Listener.modelOrSelectionChanged(SettingsTab.java:486) at org.netbeans.modules.autoupdate.ui.SettingsTab$Listener.valueChanged(SettingsTab.java:434) at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:184) at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:164) at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:211)
Created attachment 128284 [details] stacktrace
The issue 218719 was fixed after 7.3 Beta, try to download&install 7.3 Beta2 instead - http://dlc.sun.com.edgesuite.net/netbeans/7.3/beta2/ *** This bug has been marked as a duplicate of bug 218719 ***