Index: src/org/tigris/subversion/subclipse/ui/svnproperties/SvnPropertiesView.java
===================================================================
--- src/org/tigris/subversion/subclipse/ui/svnproperties/SvnPropertiesView.java	(revision 2826)
+++ src/org/tigris/subversion/subclipse/ui/svnproperties/SvnPropertiesView.java	(working copy)
@@ -414,7 +414,10 @@
 
 		Action action = getAddPropertyAction();
 		try { 		
-			action.setEnabled(resource.isManaged());
+			if (resource != null)
+				action.setEnabled(resource.isManaged());
+			else
+				action.setEnabled(false);
 		} catch (SVNException e) {
 			action.setEnabled(false);
 		}