Unexpcetd exception on filter dialog

[kempelen]

When I choose another option on how to show "side buttons" (? I use translated version).

To repoduce:

1. right click title bar of filter panel
2. under first menu item change the radio button value

below exception occurs

close if you cannot reproduce

Repository Root: http://josm.openstreetmap.de/svn
Build-Date: 2012-04-14 14:26:11
Last Changed Author: simon04
Revision: 5181
Repository UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
URL: http://josm.openstreetmap.de/svn/trunk
Last Changed Date: 2012-04-14 12:01:16 +0200 (Sat, 14 Apr 2012)
Last Changed Rev: 5181

Identification: JOSM/1.5 (5181 hu)
Memory Usage: 117 MB / 715 MB (23 MB allocated, but free)
Java version: 1.6.0_26, Sun Microsystems Inc., Java HotSpot(TM) 64-Bit Server VM
Operating system: Linux
Dataset consistency test: No problems found

Plugin: FixAddresses (27907)
Plugin: RoadSigns (27868)
Plugin: alignways (27852)
Plugin: buildings_tools (27984)
Plugin: editgpx (28204)
Plugin: measurement (27957)
Plugin: multipoly-convert (27852)
Plugin: openstreetbugs (27852)
Plugin: public_transport (28014)
Plugin: reltoolbox (27927)
Plugin: reverter (28089)
Plugin: terracer (27852)
Plugin: turnrestrictions (27891)
Plugin: utilsplugin2 (28222)
Plugin: walkingpapers (27649)

java.lang.NullPointerException
	at org.openstreetmap.josm.gui.dialogs.ToggleDialog.setIsButtonHiding(ToggleDialog.java:668)
	at org.openstreetmap.josm.gui.dialogs.ToggleDialog$TitleBar$2$2.actionPerformed(ToggleDialog.java:458)
	at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
	at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
	at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
	at javax.swing.JToggleButton$ToggleButtonModel.setPressed(JToggleButton.java:291)
	at javax.swing.AbstractButton.doClick(AbstractButton.java:357)
	at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:809)
	at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:850)
	at java.awt.Component.processMouseEvent(Component.java:6288)
	at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
	at java.awt.Component.processEvent(Component.java:6053)
	at java.awt.Container.processEvent(Container.java:2041)
	at java.awt.Component.dispatchEventImpl(Component.java:4651)
	at java.awt.Container.dispatchEventImpl(Container.java:2099)
	at java.awt.Component.dispatchEvent(Component.java:4481)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4577)
	at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4238)
	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168)
	at java.awt.Container.dispatchEventImpl(Container.java:2085)
	at java.awt.Window.dispatchEventImpl(Window.java:2478)
	at java.awt.Component.dispatchEvent(Component.java:4481)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:643)
	at java.awt.EventQueue.access$000(EventQueue.java:84)
	at java.awt.EventQueue$1.run(EventQueue.java:602)
	at java.awt.EventQueue$1.run(EventQueue.java:600)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
	at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:98)
	at java.awt.EventQueue$2.run(EventQueue.java:616)
	at java.awt.EventQueue$2.run(EventQueue.java:614)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:613)
	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)