JOSM crashes in mappaint

[piet8stevens@…]

I have downloaded the latest JOSM version, but each time when I activate mappaint, I get the following crash (immediately):
Path: josm
URL: ​http://www.openstreetmap.de/svn/josm
Repository Root: ​http://www.openstreetmap.de/svn/josm
Repository UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Revision: 352
Node Kind: directory
Last Changed Author: gebner
Last Changed Rev: 352
Last Changed Date: 2007-10-08 00:04:33 +0200 (Mon, 08 Oct 2007)

java.lang.RuntimeException: java.lang.reflect.InvocationTargetException

at org.openstreetmap.josm.gui.PleaseWaitRunnable.closeDialog(PleaseWaitRunnable.java:146)
at org.openstreetmap.josm.gui.PleaseWaitRunnable.run(PleaseWaitRunnable.java:95)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

Caused by: java.lang.reflect.InvocationTargetException

at java.awt.EventQueue.invokeAndWait(Unknown Source)
at org.openstreetmap.josm.gui.PleaseWaitRunnable.closeDialog(PleaseWaitRunnable.java:142)
... 4 more

Caused by: java.lang.NoClassDefFoundError: org/openstreetmap/josm/data/osm/Segment

at mappaint.MapPaintPlugin.layerAdded(MapPaintPlugin.java:92)
at org.openstreetmap.josm.gui.MapView.addLayer(MapView.java:121)
at org.openstreetmap.josm.Main.addLayer(Main.java:269)
at org.openstreetmap.josm.actions.downloadtasks.DownloadOsmTask$Task.finish(DownloadOsmTask.java:47)
at org.openstreetmap.josm.gui.PleaseWaitRunnable$4.run(PleaseWaitRunnable.java:128)
at java.awt.event.InvocationEvent.dispatch(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.Dialog$1.run(Unknown Source)
at java.awt.Dialog$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.awt.Dialog.show(Unknown Source)
at java.awt.Component.show(Unknown Source)
at java.awt.Component.setVisible(Unknown Source)
at java.awt.Window.setVisible(Unknown Source)
at java.awt.Dialog.setVisible(Unknown Source)
at org.openstreetmap.josm.gui.PleaseWaitRunnable$3.run(PleaseWaitRunnable.java:78)
at java.awt.event.InvocationEvent.dispatch(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)

[framm]

e-mailed ticket author to get latest version of mappaint as well. works here without trouble.