WMSplugin fails to install

[mip <mip+josm.openstreetmap.de@…>]

Path: trunk
URL: http://josm.openstreetmap.de/svn/trunk
Repository Root: http://josm.openstreetmap.de/svn
Repository UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Revision: 1257
Node Kind: directory
Last Changed Author: ulfl
Last Changed Rev: 1257
Last Changed Date: 2009-01-12 22:20:32 +0100 (Mon, 12 Jan 2009)

Plugins: DirectUpload;measurement;openvisible;slippy_map_chooser;slippymap;utilsplugin;wmsplugin
Plugin DirectUpload Version: 12780
Plugin measurement Version: 12780
Plugin openvisible Version: 12984
Plugin slippy_map_chooser Version: 13260
Plugin slippymap
Plugin utilsplugin Version: 12780

java.lang.AbstractMethodError
	at org.openstreetmap.josm.gui.preferences.PreferenceDialog.ok(PreferenceDialog.java:94)
	at org.openstreetmap.josm.actions.PreferencesAction.actionPerformed(PreferencesAction.java:75)
	at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2012)
	at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2335)
	at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:404)
	at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
	at javax.swing.AbstractButton.doClick(AbstractButton.java:374)
	at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:1688)
	at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:1732)
	at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:289)
	at java.awt.Component.processMouseEvent(Component.java:6108)
	at javax.swing.JComponent.processMouseEvent(JComponent.java:3276)
	at java.awt.Component.processEvent(Component.java:5873)
	at java.awt.Container.processEvent(Container.java:2105)
	at java.awt.Component.dispatchEventImpl(Component.java:4469)
	at java.awt.Container.dispatchEventImpl(Container.java:2163)
	at java.awt.Component.dispatchEvent(Component.java:4295)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4461)
	at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4125)
	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4055)
	at java.awt.Container.dispatchEventImpl(Container.java:2149)
	at java.awt.Window.dispatchEventImpl(Window.java:2478)
	at java.awt.Component.dispatchEvent(Component.java:4295)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:604)
	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:138)

[stoecker]

Duplicate #1883. Remove slippymap plugin from you plugin directory manually.