Index: src/app/qgsuniquevaluedialog.cpp
===================================================================
--- src/app/qgsuniquevaluedialog.cpp	(revision 13746)
+++ src/app/qgsuniquevaluedialog.cpp	(working copy)
@@ -428,11 +428,11 @@
     }
 
     QgsSymbol *symbol = mValues[ value ];
-    symbol->setLabel( sydialog.label() );
+    //symbol->setLabel( sydialog.label() );// don't overwrite existing label; if needed, done by sydialog.apply(symbol) 
     symbol->setLowerValue( value );
     sydialog.apply( symbol );
 
-    item->setToolTip( sydialog.label() );
+    item->setToolTip( symbol.label() );
     item->setData( Qt::UserRole, value );
     updateEntryIcon( symbol, item );
   }