game crash + error report

[martinuzz]

Game just crashed on me when exiting log cabin.
This is the error report:

javax.media.opengl.GLException: java.util.ConcurrentModificationException
at javax.media.opengl.Threading.invokeOnOpenGLThread(Threading.java:271)
at javax.media.opengl.GLCanvas.maybeDoSingleThreadedWorkaround(GLCanvas.java:410)
at javax.media.opengl.GLCanvas.display(GLCanvas.java:244)
at haven.HavenPanel.uglyjoglhack(HavenPanel.java:352)
at haven.HavenPanel.run(HavenPanel.java:381)
at java.lang.Thread.run(Unknown Source)
Caused by: java.util.ConcurrentModificationException
at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source)
at java.util.TreeMap$EntryIterator.next(Unknown Source)
at java.util.TreeMap$EntryIterator.next(Unknown Source)
at haven.MCache.sendreqs(MCache.java:456)
at haven.MapView.draw(MapView.java:866)
at haven.Widget.draw(Widget.java:282)
at haven.RootWidget.draw(RootWidget.java:73)
at haven.UI.draw(UI.java:94)
at haven.HavenPanel.redraw(HavenPanel.java:255)
at haven.HavenPanel$1.display(HavenPanel.java:77)
at com.sun.opengl.impl.GLDrawableHelper.display(GLDrawableHelper.java:78)
at javax.media.opengl.GLCanvas$DisplayAction.run(GLCanvas.java:435)
at com.sun.opengl.impl.GLDrawableHelper.invokeGL(GLDrawableHelper.java:194)
at javax.media.opengl.GLCanvas$DisplayOnEventDispatchThreadAction.run(GLCanvas.java:452)
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)