sun.awt.X11.XException when clicking Help>About

[A_Pirard]

See attached file (I suppose it's not true that I have to add a status report to it, do I?).
Need I say anything else?
Yes, I also got weird exceptions when clicking left panel Draw nodes (A) icon.
Intermittent, no longer occurred.
Cheers.

Repository Root: http://josm.openstreetmap.de/svn
Build-Date: 2014-10-21 19:23:06
Last Changed Author: Don-vip
Revision: 7643
Repository UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Relative URL: ^/trunk
URL: http://josm.openstreetmap.de/svn/trunk
Last Changed Date: 2014-10-21 21:19:16 +0200 (Tue, 21 Oct 2014)
Last Changed Rev: 7643

Identification: JOSM/1.5 (7643 en) Linux Mint 13 Maya
Memory Usage: 649 MB / 1267 MB (263 MB allocated, but free)
Java version: 1.7.0_25, Oracle Corporation, OpenJDK 64-Bit Server VM
Java package: openjdk-7-jre:amd64-7u25-2.3.10-1ubuntu0.12.04.2
VM arguments: [-Djosm.restart=true, -Djava.net.useSystemProxies=true]
Dataset consistency test: No problems found

Plugins:
- FixAddresses (30737)
- OpeningHoursEditor (30737)
- PicLayer (30762)
- RoadSigns (30788)
- download_along (30762)
- editgpx (30737)
- geotools (30762)
- importvec (30762)
- jts (30762)
- opendata (30762)
- osmarender (30738)
- reltoolbox (30762)
- reverter (30737)
- tagging-preset-tester (30736)
- turnrestrictions (30762)
- utilsplugin2 (30762)
- waydownloader (30762)

Last errors/warnings:
- W: Could not get presets icon presets/turning_circle.png
- E: java.io.FileNotFoundException: no/home/p/.josm/Traffic rules BE.xml
(No such file or directory)
- E: no/home/p/.josm/Traffic rules BE.xml
- W: Detected deprecated 'canvas{background-color}' in
'/home/p/.josm/Papou.css' which will be removed shortly. Use
'fill-color' instead.
- E: sun.awt.X11.XException: Cannot write XdndAware property

sun.awt.X11.XException: Cannot write XdndAware property
    at sun.awt.X11.XDnDDropTargetProtocol.registerDropTarget(XDnDDropTargetProtocol.java:97)
    at sun.awt.X11.XDropTargetRegistry.registerDropSite(XDropTargetRegistry.java:571)
    at sun.awt.X11.XWindowPeer.addDropTarget(XWindowPeer.java:1919)
    at sun.awt.X11.XComponentPeer.addDropTarget(XComponentPeer.java:1374)
    at java.awt.dnd.DropTarget.addNotify(DropTarget.java:509)
    at java.awt.Component.addNotify(Component.java:6913)
    at java.awt.Container.addNotify(Container.java:2758)
    at javax.swing.JComponent.addNotify(JComponent.java:4734)
    at java.awt.Container.addNotify(Container.java:2769)
    at javax.swing.JComponent.addNotify(JComponent.java:4734)
    at java.awt.Container.addNotify(Container.java:2769)
    at javax.swing.JComponent.addNotify(JComponent.java:4734)
    at java.awt.Container.addNotify(Container.java:2769)
    at javax.swing.JComponent.addNotify(JComponent.java:4734)
    at java.awt.Container.addNotify(Container.java:2769)
    at javax.swing.JComponent.addNotify(JComponent.java:4734)
    at java.awt.Container.addNotify(Container.java:2769)
    at javax.swing.JComponent.addNotify(JComponent.java:4734)
    at java.awt.Container.addNotify(Container.java:2769)
    at javax.swing.JComponent.addNotify(JComponent.java:4734)
    at java.awt.Container.addNotify(Container.java:2769)
    at javax.swing.JComponent.addNotify(JComponent.java:4734)
    at java.awt.Container.addNotify(Container.java:2769)
    at javax.swing.JComponent.addNotify(JComponent.java:4734)
    at java.awt.Container.addNotify(Container.java:2769)
    at javax.swing.JComponent.addNotify(JComponent.java:4734)
    at java.awt.Container.addNotify(Container.java:2769)
    at javax.swing.JComponent.addNotify(JComponent.java:4734)
    at javax.swing.JRootPane.addNotify(JRootPane.java:756)
    at java.awt.Container.addNotify(Container.java:2769)
    at java.awt.Window.addNotify(Window.java:770)
    at java.awt.Dialog.addNotify(Dialog.java:760)
    at java.awt.Window.pack(Window.java:807)
    at javax.swing.JOptionPane.initDialog(JOptionPane.java:987)
    at javax.swing.JOptionPane.createDialog(JOptionPane.java:968)
    at javax.swing.JOptionPane.showOptionDialog(JOptionPane.java:867)
    at javax.swing.JOptionPane.showMessageDialog(JOptionPane.java:667)
    at org.openstreetmap.josm.actions.AboutAction.actionPerformed(AboutAction.java:107)
    at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2018)
    at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2341)
    at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
    at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
    at javax.swing.AbstractButton.doClick(AbstractButton.java:376)
    at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:833)
    at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:877)
    at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:289)
    at java.awt.Component.processMouseEvent(Component.java:6505)
    at javax.swing.JComponent.processMouseEvent(JComponent.java:3312)
    at java.awt.Component.processEvent(Component.java:6270)
    at java.awt.Container.processEvent(Container.java:2229)
    at java.awt.Component.dispatchEventImpl(Component.java:4861)
    at java.awt.Container.dispatchEventImpl(Container.java:2287)
    at java.awt.Component.dispatchEvent(Component.java:4687)
    at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4832)
    at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4492)
    at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4422)
    at java.awt.Container.dispatchEventImpl(Container.java:2273)
    at java.awt.Window.dispatchEventImpl(Window.java:2719)
    at java.awt.Component.dispatchEvent(Component.java:4687)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:735)
    at java.awt.EventQueue.access$200(EventQueue.java:103)
    at java.awt.EventQueue$3.run(EventQueue.java:694)
    at java.awt.EventQueue$3.run(EventQueue.java:692)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
    at java.awt.EventQueue$4.run(EventQueue.java:708)
    at java.awt.EventQueue$4.run(EventQueue.java:706)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:705)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)

[Don-vip]

Closed as duplicate of #9771.
Please update to Java 8u20 or later to get rid of this bug.