crash of 4667 josm right after startup

[MK]

What steps will reproduce the problem?

1. install beta openseamap editor plugin (smed.jar)
2. download & activate released openseamap editor plugin (seamapeditor) and deactivate beta version of the plugin
3. restart josm for the change to take effect
4. crash at startup

What is the expected result?
no crash

What happens instead?
crash immediately after startup

Please provide any additional information below. Attach a screenshot if
possible.

Repository Root: http://josm.openstreetmap.de/svn
Build-Date: 2011-12-19 02:32:42
Last Changed Author: Don-vip
Revision: 4667
Repository UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
URL: http://josm.openstreetmap.de/svn/trunk
Last Changed Date: 2011-12-19 00:02:30 +0100 (Mon, 19 Dec 2011)
Last Changed Rev: 4667

Identification: JOSM/1.5 (4667 de)
Memory Usage: 159 MB / 1329 MB (99 MB allocated, but free)
Java version: 1.6.0_23, Sun Microsystems Inc., OpenJDK 64-Bit Server VM
Operating system: Linux

Plugin: RoadSigns (27289)
Plugin: SeaMapEditor (27391)
Plugin: buildings_tools (27355)

java.lang.NullPointerException
	at oseam.panels.PanelSectors$SectorTable.getValueAt(PanelSectors.java:155)
	at javax.swing.JTable.getValueAt(JTable.java:2719)
	at javax.swing.JTable.prepareRenderer(JTable.java:5719)
	at javax.swing.plaf.synth.SynthTableUI.paintCell(SynthTableUI.java:636)
	at javax.swing.plaf.synth.SynthTableUI.paintCells(SynthTableUI.java:533)
	at javax.swing.plaf.synth.SynthTableUI.paint(SynthTableUI.java:322)
	at javax.swing.plaf.synth.SynthTableUI.update(SynthTableUI.java:251)
	at javax.swing.JComponent.paintComponent(JComponent.java:765)
	at javax.swing.JComponent.paint(JComponent.java:1029)
	at javax.swing.JComponent.paintChildren(JComponent.java:866)
	at javax.swing.JComponent.paint(JComponent.java:1038)
	at javax.swing.JViewport.paint(JViewport.java:764)
	at javax.swing.JComponent.paintChildren(JComponent.java:866)
	at javax.swing.JComponent.paint(JComponent.java:1038)
	at javax.swing.JComponent.paintChildren(JComponent.java:866)
	at javax.swing.JComponent.paint(JComponent.java:1038)
	at javax.swing.JComponent.paintChildren(JComponent.java:866)
	at javax.swing.JComponent.paint(JComponent.java:1038)
	at javax.swing.JComponent.paintChildren(JComponent.java:866)
	at javax.swing.JComponent.paint(JComponent.java:1038)
	at javax.swing.JLayeredPane.paint(JLayeredPane.java:581)
	at javax.swing.JComponent.paintChildren(JComponent.java:866)
	at javax.swing.JComponent.paintToOffscreen(JComponent.java:5145)
	at javax.swing.BufferStrategyPaintManager.paint(BufferStrategyPaintManager.java:302)
	at javax.swing.RepaintManager.paint(RepaintManager.java:1188)
	at javax.swing.JComponent.paint(JComponent.java:1015)
	at java.awt.GraphicsCallback$PaintCallback.run(GraphicsCallback.java:39)
	at sun.awt.SunGraphicsCallback.runOneComponent(SunGraphicsCallback.java:78)
	at sun.awt.SunGraphicsCallback.runComponents(SunGraphicsCallback.java:115)
	at java.awt.Container.paint(Container.java:1784)
	at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:794)
	at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:735)
	at javax.swing.RepaintManager.prePaintDirtyRegions(RepaintManager.java:677)
	at javax.swing.RepaintManager.access$700(RepaintManager.java:58)
	at javax.swing.RepaintManager$ProcessingRunnable.run(RepaintManager.java:1593)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:226)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:647)
	at java.awt.EventQueue.access$000(EventQueue.java:96)
	at java.awt.EventQueue$1.run(EventQueue.java:608)
	at java.awt.EventQueue$1.run(EventQueue.java:606)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:105)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:617)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:275)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:200)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:190)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:185)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:177)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:13

[Don-vip]

Solution is to not install the beta plugin first.