diff -r c07f1605bc26 boost/numeric/ublas/matrix_sparse.hpp
--- a/boost/numeric/ublas/matrix_sparse.hpp	Wed Apr 25 08:33:42 2007 -0400
+++ b/boost/numeric/ublas/matrix_sparse.hpp	Wed Apr 25 09:37:32 2007 -0400
@@ -2727,7 +2727,7 @@ namespace boost { namespace numeric { na
             capacity_ = restrict_capacity (non_zeros);
             if (preserve) {
                 index2_data_.resize (capacity_, size_type ());
-                value_data_.resize (capacity_, value_type ());
+                value_data_.resize (capacity_, true);
                 filled2_ = (std::min) (capacity_, filled2_);
             }
             else {
@@ -4071,7 +4071,7 @@ namespace boost { namespace numeric { na
             if (preserve) {
                 index1_data_.resize (capacity_, size_type ());
                 index2_data_.resize (capacity_, size_type ());
-                value_data_.resize (capacity_, value_type ());
+                value_data_.resize (capacity_, true);
                 filled_ = (std::min) (capacity_, filled_);
             }
             else {
diff -r c07f1605bc26 boost/numeric/ublas/vector_sparse.hpp
--- a/boost/numeric/ublas/vector_sparse.hpp	Wed Apr 25 08:33:42 2007 -0400
+++ b/boost/numeric/ublas/vector_sparse.hpp	Wed Apr 25 09:37:32 2007 -0400
@@ -882,15 +882,15 @@ namespace boost { namespace numeric { na
             size_ = size;
             capacity_ = restrict_capacity (capacity_);
             if (preserve) {
-                index_data_. resize (capacity_, size_type ());
-                value_data_. resize (capacity_, value_type ());
+	      index_data_. resize (capacity_, true, size_type (), true);
+                value_data_. resize (capacity_, true);
                 filled_ = (std::min) (capacity_, filled_);
                 while ((filled_ > 0) && (zero_based(index_data_[filled_ - 1]) >= size)) {
                     --filled_;
                 }
             }
             else {
-                index_data_. resize (capacity_);
+	      index_data_. resize (capacity_, false, size_type(), true);
                 value_data_. resize (capacity_);
                 filled_ = 0;
             }
@@ -902,12 +902,12 @@ namespace boost { namespace numeric { na
         void reserve (size_type non_zeros, bool preserve = true) {
             capacity_ = restrict_capacity (non_zeros);
             if (preserve) {
-                index_data_. resize (capacity_, size_type ());
-                value_data_. resize (capacity_, value_type ());
+	      index_data_. resize (capacity_, true, size_type (), true);
+                value_data_. resize (capacity_, true);
                 filled_ = (std::min) (capacity_, filled_);
             }
             else {
-                index_data_. resize (capacity_);
+	      index_data_. resize (capacity_, true, size_type(), true);
                 value_data_. resize (capacity_);
                 filled_ = 0;
             }
@@ -1511,15 +1511,15 @@ namespace boost { namespace numeric { na
             size_ = size;
             capacity_ = restrict_capacity (capacity_);
             if (preserve) {
-                index_data_. resize (capacity_, size_type ());
-                value_data_. resize (capacity_, value_type ());
+	      index_data_. resize (capacity_, true, size_type(), true);
+                value_data_. resize (capacity_, true);
                 filled_ = (std::min) (capacity_, filled_);
                 while ((filled_ > 0) && (zero_based(index_data_[filled_ - 1]) >= size)) {
                     --filled_;
                 }
             }
             else {
-                index_data_. resize (capacity_);
+	      index_data_. resize (capacity_, true, size_type(), true);
                 value_data_. resize (capacity_);
                 filled_ = 0;
             }
@@ -1533,11 +1533,11 @@ namespace boost { namespace numeric { na
                 sort ();    // remove duplicate elements.
             capacity_ = restrict_capacity (non_zeros);
             if (preserve) {
-                index_data_. resize (capacity_, size_type ());
-                value_data_. resize (capacity_, value_type ());
+	      index_data_. resize (capacity_, true, size_type(), true);
+                value_data_. resize (capacity_, true);
                 filled_ = (std::min) (capacity_, filled_);
                 }
             else {
-                index_data_. resize (capacity_);
+	      index_data_. resize (capacity_, true, size_type(), true);
                 value_data_. resize (capacity_);
                 filled_ = 0;
             }