### Eclipse Workspace Patch 1.0
#P org.eclipse.compare
Index: compare/org/eclipse/compare/CompareViewerSwitchingPane.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.compare/plugins/org.eclipse.compare/compare/org/eclipse/compare/CompareViewerSwitchingPane.java,v
retrieving revision 1.34
diff -u -r1.34 CompareViewerSwitchingPane.java
--- compare/org/eclipse/compare/CompareViewerSwitchingPane.java	17 Mar 2009 12:08:26 -0000	1.34
+++ compare/org/eclipse/compare/CompareViewerSwitchingPane.java	29 Apr 2009 13:44:28 -0000
@@ -11,13 +11,19 @@
 package org.eclipse.compare;
 
 import org.eclipse.compare.contentmergeviewer.IFlushable;
-import org.eclipse.compare.internal.*;
+import org.eclipse.compare.internal.CompareMessages;
+import org.eclipse.compare.internal.NullViewer;
+import org.eclipse.compare.internal.Utilities;
 import org.eclipse.compare.structuremergeviewer.ICompareInput;
-import org.eclipse.jface.viewers.*;
+import org.eclipse.jface.viewers.ISelection;
+import org.eclipse.jface.viewers.StructuredViewer;
+import org.eclipse.jface.viewers.Viewer;
 import org.eclipse.swt.events.DisposeEvent;
 import org.eclipse.swt.events.DisposeListener;
 import org.eclipse.swt.graphics.Image;
-import org.eclipse.swt.widgets.*;
+import org.eclipse.swt.widgets.Composite;
+import org.eclipse.swt.widgets.Control;
+import org.eclipse.swt.widgets.Display;
 
 import com.ibm.icu.text.MessageFormat;
 
@@ -269,6 +275,9 @@
 		// set input
 		fViewer.setInput(input);
 
+		if (!Utilities.okToUse(fViewer.getControl()))
+			return;
+
 		Image image= null;
 		if (!(fViewer instanceof NullViewer) && input instanceof ICompareInput)
 			image= ((ICompareInput)input).getImage();