I believe it's an error caused by i18n plugin, not in core.
java.lang.NullPointerException
at i18nAZ.TreeTableManager$1.controlResized(TreeTableManager.java:583)
at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:235)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4353)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1061)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1085)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1066)
at org.eclipse.swt.widgets.Table.wmNotifyHeader(Table.java:7192)
at org.eclipse.swt.widgets.Table.wmNotify(Table.java:6703)
at org.eclipse.swt.widgets.Control.WM_NOTIFY(Control.java:5193)
at org.eclipse.swt.widgets.Control.windowProc(Control.java:4683)
at org.eclipse.swt.widgets.Table.windowProc(Table.java:5952)
at org.eclipse.swt.widgets.Display.windowProc(Display.java:5037)
at org.eclipse.swt.internal.win32.OS.CallWindowProcW(Native Method)
at org.eclipse.swt.internal.win32.OS.CallWindowProc(OS.java:2443)
at org.eclipse.swt.widgets.Table.callWindowProc(Table.java:450)
at org.eclipse.swt.widgets.Table.callWindowProc(Table.java:444)
at org.eclipse.swt.widgets.Table.windowProc(Table.java:5864)
at org.eclipse.swt.widgets.Display.windowProc(Display.java:5050)
at org.eclipse.swt.internal.win32.OS.DispatchMessageW(Native Method)
at org.eclipse.swt.internal.win32.OS.DispatchMessage(OS.java:2549)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3759)
at org.gudy.azureus2.ui.swt.mainwindow.SWTThread.<init>(SWTThread.java:306)
at org.gudy.azureus2.ui.swt.mainwindow.SWTThread.createInstance(SWTThread.java:61)
at com.aelitis.azureus.ui.swt.Initializer.<init>(Initializer.java:160)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at org.gudy.azureus2.ui.swt.Main.<init>(Main.java:111)
at org.gudy.azureus2.ui.swt.Main.main(Main.java:334)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.aelitis.azureus.launcher.MainExecutor$1.run(MainExecutor.java:34)
at java.lang.Thread.run(Unknown Source)
java.lang.NullPointerException
at i18nAZ.TreeTableManager$1.controlResized(TreeTableManager.java:583)
at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:235)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4353)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1061)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1085)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1066)
at org.eclipse.swt.widgets.Table.wmNotifyHeader(Table.java:7192)
at org.eclipse.swt.widgets.Table.wmNotify(Table.java:6703)
at org.eclipse.swt.widgets.Control.WM_NOTIFY(Control.java:5193)
at org.eclipse.swt.widgets.Control.windowProc(Control.java:4683)
at org.eclipse.swt.widgets.Table.windowProc(Table.java:5952)
at org.eclipse.swt.widgets.Display.windowProc(Display.java:5037)
at org.eclipse.swt.internal.win32.OS.CallWindowProcW(Native Method)
at org.eclipse.swt.internal.win32.OS.CallWindowProc(OS.java:2443)
at org.eclipse.swt.widgets.Table.callWindowProc(Table.java:450)
at org.eclipse.swt.widgets.Table.callWindowProc(Table.java:444)
at org.eclipse.swt.widgets.Table.windowProc(Table.java:5864)
at org.eclipse.swt.widgets.Display.windowProc(Display.java:5050)
at org.eclipse.swt.internal.win32.OS.DispatchMessageW(Native Method)
at org.eclipse.swt.internal.win32.OS.DispatchMessage(OS.java:2549)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3759)
at org.gudy.azureus2.ui.swt.mainwindow.SWTThread.<init>(SWTThread.java:306)
at org.gudy.azureus2.ui.swt.mainwindow.SWTThread.createInstance(SWTThread.java:61)
at com.aelitis.azureus.ui.swt.Initializer.<init>(Initializer.java:160)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at org.gudy.azureus2.ui.swt.Main.<init>(Main.java:111)
at org.gudy.azureus2.ui.swt.Main.main(Main.java:334)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.aelitis.azureus.launcher.MainExecutor$1.run(MainExecutor.java:34)
at java.lang.Thread.run(Unknown Source)