diff -uNr old/slideshow/source/engine/shapes/drawshape.cxx new/slideshow/source/engine/shapes/drawshape.cxx
--- old/slideshow/source/engine/shapes/drawshape.cxx	2008-01-23 18:34:58.218750000 +0800
+++ new/slideshow/source/engine/shapes/drawshape.cxx	2008-01-23 18:34:36.046875000 +0800
@@ -929,8 +929,14 @@
         }
 
         // hyperlink support
-        void DrawShape::prepareHyperlinkIndices()
+        void DrawShape::prepareHyperlinkIndices() const
         {
+            if ( !maHyperlinkIndices.empty())
+            {
+                maHyperlinkIndices.clear();
+                maHyperlinkRegions.clear();
+            }
+
             sal_Int32 nIndex = 0;
             for ( MetaAction * pCurrAct = mpCurrMtf->FirstAction();
                   pCurrAct != 0; pCurrAct = mpCurrMtf->NextAction() )
@@ -1299,6 +1305,11 @@
         {
             ensureVerboseMtfComments();
 
+            if ( hasHyperlinks())
+            {
+                prepareHyperlinkIndices();
+            }
+
             return maSubsetting.getTreeNode( nNodeIndex, eNodeType );
         }
 
diff -uNr old/slideshow/source/engine/shapes/drawshape.hxx new/slideshow/source/engine/shapes/drawshape.hxx
--- old/slideshow/source/engine/shapes/drawshape.hxx	2008-01-23 18:32:38.656250000 +0800
+++ new/slideshow/source/engine/shapes/drawshape.hxx	2008-01-23 18:31:15.437500000 +0800
@@ -296,7 +296,7 @@
             void ensureVerboseMtfComments() const;
             bool hasIntrinsicAnimation() const;
             bool hasHyperlinks() const;
-            void prepareHyperlinkIndices();
+            void prepareHyperlinkIndices() const;
             
             /// The associated XShape
             ::com::sun::star::uno::Reference< 
@@ -354,7 +354,7 @@
             typedef ::std::pair<sal_Int32 /* mtf start */,
                                 sal_Int32 /* mtf end */> HyperlinkIndexPair;
             typedef ::std::vector<HyperlinkIndexPair> HyperlinkIndexPairVector;
-            HyperlinkIndexPairVector                                                maHyperlinkIndices;
+            mutable HyperlinkIndexPairVector                                        maHyperlinkIndices;
             mutable HyperlinkRegions                                                maHyperlinkRegions;
             
             /// Delegated subset handling