NoSuchMethodError opening Worksheet, sqldeveloper 3.2.20.09.87

Switched systems.
Copied ~/.sqldeveloper
Installed latest sqldeveloper 3.2.20.09.87.
Imported settings when asked.

Connection test success
NoSuchMethodError when opening a worksheet or expanding open connection tree.

Old sqldeveloper works fine:
Java(TM) Platform     1.6.0_34
Oracle IDE     3.0.04.34
Versioning Support     3.0.04.34

New sqldeveloper:
Java(TM) Platform     1.6.0_34
Oracle IDE     3.2.20.09.87
Versioning Support     3.2.20.09.87

Suggestions?

Console log:
--------------------

Oracle SQL Developer
Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.

Exception occurred during event dispatching:
java.lang.NoSuchMethodError: oracle.dbtools.raptor.controls.DBConnectionComboBox.addConnectionOpenListener(Loracle/dbtools/raptor/controls/IDBConnectionComboBoxListener;Loracle/dbtools/raptor/backgroundTask/ui/ITaskViewer;)V
     at oracle.dbtools.worksheet.editor.Worksheet.initToolbar(Worksheet.java:1225)
     at oracle.dbtools.worksheet.editor.Worksheet.getToolbar(Worksheet.java:1174)
     at oracle.dbtools.worksheet.editor.Worksheet.getFixedTopMargin(Worksheet.java:1265)
     at oracle.ideimpl.editor.SplitPane.attachEditor(SplitPane.java:1019)
     at oracle.ideimpl.editor.SplitPane.attachCurrentEditor(SplitPane.java:1004)
     at oracle.ideimpl.editor.SplitPane.setCurrentEditorStatePos(SplitPane.java:1242)
     at oracle.ideimpl.editor.SplitPane.setSplitPaneState(SplitPane.java:234)
     at oracle.ideimpl.editor.TabGroup.attachCurrentNode(TabGroup.java:621)
     at oracle.ideimpl.editor.TabGroup.setCurrentTabGroupState(TabGroup.java:1427)
     at oracle.ideimpl.editor.TabGroup.activateEditor(TabGroup.java:752)
     at oracle.ideimpl.editor.EditorManagerImpl.createEditor(EditorManagerImpl.java:1415)
     at oracle.ideimpl.editor.EditorManagerImpl.createEditor(EditorManagerImpl.java:1337)
     at oracle.ideimpl.editor.EditorManagerImpl.openEditor(EditorManagerImpl.java:1263)
     at oracle.dbtools.worksheet.editor.OpenWorksheetWizard.openNewTempWorksheet(OpenWorksheetWizard.java:426)
     at oracle.dbtools.worksheet.editor.OpenWorksheetWizard.openNewTempWorksheet(OpenWorksheetWizard.java:407)
     at oracle.dbtools.worksheet.extension.WorksheetConnectionListener.connectionOpened(WorksheetConnectionListener.java:62)
     at oracle.dbtools.raptor.utils.Connections$1.run(Connections.java:1014)
     at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
     at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:646)
     at java.awt.EventQueue.access$000(EventQueue.java:84)
     at java.awt.EventQueue$1.run(EventQueue.java:607)
     at java.awt.EventQueue$1.run(EventQueue.java:605)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
     at java.awt.EventQueue.dispatchEvent(EventQueue.java:616)
     at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
     at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
     at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:178)
     at java.awt.Dialog$1.run(Dialog.java:1044)
     at java.awt.Dialog$3.run(Dialog.java:1096)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.awt.Dialog.show(Dialog.java:1094)
     at java.awt.Component.show(Component.java:1584)
     at java.awt.Component.setVisible(Component.java:1536)
     at java.awt.Window.setVisible(Window.java:843)
     at java.awt.Dialog.setVisible(Dialog.java:984)
     at oracle.dbtools.raptor.backgroundTask.TaskDialog.showDelayedDialog(TaskDialog.java:84)
     at oracle.dbtools.raptor.backgroundTask.RaptorTaskManager.showModalDialog(RaptorTaskManager.java:290)
     at oracle.dbtools.raptor.backgroundTask.RaptorTaskManager.access$600(RaptorTaskManager.java:41)
     at oracle.dbtools.raptor.backgroundTask.RaptorTaskManager$2.run(RaptorTaskManager.java:272)
     at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
     at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:646)
     at java.awt.EventQueue.access$000(EventQueue.java:84)
     at java.awt.EventQueue$1.run(EventQueue.java:607)
     at java.awt.EventQueue$1.run(EventQueue.java:605)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
     at java.awt.EventQueue.dispatchEvent(EventQueue.java:616)
     at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
     at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
     at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
     at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)