Game crash w/ dump

[TheDrill]

haven.UI$UIException: Uimsg to non-existent widget 15555
at haven.UI.uimsg(UI.java:227)
at haven.RemoteUI.run(RemoteUI.java:62)
at haven.MainFrame.run(MainFrame.java:151)
at haven.MainFrame.main2(MainFrame.java:222)
at haven.MainFrame.access$100(MainFrame.java:34)
at haven.MainFrame$5.run(MainFrame.java:258)
at java.lang.Thread.run(Unknown Source)

Was grinding kuksas from a ~q150 tree at moment of crash. (There were a lot of them on the ground.)

WinXP Pro SP2
Core2 6600
(8800GTX, 4gb ram)