Version update
diff --git a/org.eclipse.mylyn.monitor.ui/src/org/eclipse/mylyn/monitor/ui/workbench/BrowserMonitor.java b/org.eclipse.mylyn.monitor.ui/src/org/eclipse/mylyn/monitor/ui/workbench/BrowserMonitor.java
index d8ce4dd..7f61d8b 100644
--- a/org.eclipse.mylyn.monitor.ui/src/org/eclipse/mylyn/monitor/ui/workbench/BrowserMonitor.java
+++ b/org.eclipse.mylyn.monitor.ui/src/org/eclipse/mylyn/monitor/ui/workbench/BrowserMonitor.java
@@ -85,8 +85,9 @@
 	public void partClosed(IWorkbenchPart part) {
 		if (part instanceof WebBrowserEditor) {
 			Browser browser = getBrowser((WebBrowserEditor) part);
-			if (browser != null)
+			if (browser != null && !browser.isDisposed()) {
 				browser.removeLocationListener(urlTrackingListener);
+			}
 		}
 	}