diff --git a/doc/ordered-hpp.qbk b/doc/ordered-hpp.qbk
index 718f1f9..9e860d4 100644
--- a/doc/ordered-hpp.qbk
+++ b/doc/ordered-hpp.qbk
@@ -19,11 +19,11 @@ The function `is_sorted(sequence)` determines whether or not a sequence is compl
 
 ``
 namespace boost { namespace algorithm {
-	template <typename Iterator, typename Pred>
-	bool is_sorted ( Iterator first, Iterator last, Pred p );
+	template <typename ForwardIterator, typename Pred>
+	bool is_sorted ( ForwardIterator first, ForwardIterator last, Pred p );
 	
-	template <typename Iterator>
-	bool is_sorted ( Iterator first, Iterator last );
+	template <typename ForwardIterator>
+	bool is_sorted ( ForwardIterator first, ForwardIterator last );
 	
 	
 	template <typename Range, typename Pred>
@@ -34,7 +34,7 @@ namespace boost { namespace algorithm {
 }}
 ``
 
-Iterator requirements: The `is_sorted` functions will work on all kinds of iterators (except output iterators). 
+Iterator requirements: The `is_sorted` functions will work forward iterators or better.
 
 [heading is_sorted_until]
 
@@ -88,8 +88,8 @@ To test if a sequence is decreasing (each element no larger than the preceding o
 
 ``
 namespace boost { namespace algorithm {
-	template <typename Iterator>
-	bool is_decreasing ( Iterator first, Iterator last );
+	template <typename ForwardIterator>
+	bool is_decreasing ( ForwardIterator first, ForwardIterator last );
 	
 	template <typename R>
 	bool is_decreasing ( const R &range );
@@ -99,8 +99,8 @@ namespace boost { namespace algorithm {
 To test if a sequence is strictly increasing (each element larger than the preceding one):
 ``
 namespace boost { namespace algorithm {
-	template <typename Iterator>
-	bool is_strictly_increasing ( Iterator first, Iterator last );
+	template <typename ForwardIterator>
+	bool is_strictly_increasing ( ForwardIterator first, ForwardIterator last );
 	
 	template <typename R>
 	bool is_strictly_increasing ( const R &range );
@@ -110,8 +110,8 @@ namespace boost { namespace algorithm {
 To test if a sequence is strictly decreasing (each element smaller than the preceding one):
 ``
 namespace boost { namespace algorithm {
-	template <typename Iterator>
-	bool is_strictly_decreasing ( Iterator first, Iterator last );
+	template <typename ForwardIterator>
+	bool is_strictly_decreasing ( ForwardIterator first, ForwardIterator last );
 	
 	template <typename R>
 	bool is_strictly_decreasing ( const R &range );
diff --git a/include/boost/algorithm/cxx11/iota.hpp b/include/boost/algorithm/cxx11/iota.hpp
index b4f0daf..eb32390 100644
--- a/include/boost/algorithm/cxx11/iota.hpp
+++ b/include/boost/algorithm/cxx11/iota.hpp
@@ -63,8 +63,8 @@ void iota ( Range &r, T value )
 template <typename OutputIterator, typename T>
 OutputIterator iota_n ( OutputIterator out, T value, std::size_t n )
 {
-    while ( n-- > 0 )
-        *out++ = value++;
+    for ( ; n > 0; --n, ++value )
+        *out++ = value;
 
     return out;
 }
diff --git a/include/boost/algorithm/cxx11/is_permutation.hpp b/include/boost/algorithm/cxx11/is_permutation.hpp
index e1273f1..3eff5ce 100644
--- a/include/boost/algorithm/cxx11/is_permutation.hpp
+++ b/include/boost/algorithm/cxx11/is_permutation.hpp
@@ -21,7 +21,6 @@
 #include <boost/range/end.hpp>
 #include <boost/utility/enable_if.hpp>
 #include <boost/type_traits/is_same.hpp>
-#include <boost/tr1/tr1/tuple>      // for tie
 
 namespace boost { namespace algorithm {
 
@@ -121,7 +120,6 @@ bool is_permutation ( ForwardIterator1 first1, ForwardIterator1 last1,
                       ForwardIterator2 first2, BinaryPredicate p )
 {
 //  Skip the common prefix (if any)
-//  std::tie (first1, first2) = std::mismatch (first1, last1, first2, p);
     std::pair<ForwardIterator1, ForwardIterator2> eq = std::mismatch (first1, last1, first2, p);
     first1 = eq.first;
     first2 = eq.second;
diff --git a/include/boost/algorithm/searching/detail/bm_traits.hpp b/include/boost/algorithm/searching/detail/bm_traits.hpp
index ea150c3..9c25540 100644
--- a/include/boost/algorithm/searching/detail/bm_traits.hpp
+++ b/include/boost/algorithm/searching/detail/bm_traits.hpp
@@ -20,7 +20,11 @@
 #include <boost/type_traits/remove_const.hpp>
 
 #include <boost/array.hpp>
+#ifdef BOOST_NO_CXX11_HDR_UNORDERED_MAP
 #include <boost/tr1/tr1/unordered_map>
+#else
+#include <unordered_map>
+#endif
 
 #include <boost/algorithm/searching/detail/debugging.hpp>
 
@@ -35,7 +39,11 @@ namespace boost { namespace algorithm { namespace detail {
     template<typename key_type, typename value_type>
     class skip_table<key_type, value_type, false> {
     private:
+#ifdef BOOST_NO_CXX11_HDR_UNORDERED_MAP
         typedef std::tr1::unordered_map<key_type, value_type> skip_map;
+#else
+        typedef std::unordered_map<key_type, value_type> skip_map;
+#endif
         const value_type k_default_value;
         skip_map skip_;
         
diff --git a/test/iota_test1.cpp b/test/iota_test1.cpp
index 080d3d7..747691f 100644
--- a/test/iota_test1.cpp
+++ b/test/iota_test1.cpp
@@ -42,11 +42,11 @@ void test_ints () {
     std::vector<int> v;
     std::list<int> l;
 
-    v.clear (); v.reserve ( 10 );
+    v.clear (); v.resize ( 10 );
     boost::algorithm::iota ( v.begin (), v.end (), 23 );
     BOOST_CHECK ( test_iota_results ( v.begin (), v.end (), 23 ));
     
-    v.clear (); v.reserve ( 19 );
+    v.clear (); v.resize ( 19 );
     boost::algorithm::iota ( v, 18 );
     BOOST_CHECK ( test_iota_results ( v, 18 ));
     
@@ -54,6 +54,10 @@ void test_ints () {
     boost::algorithm::iota_n ( std::back_inserter(v), 99, 20 );
     BOOST_CHECK ( test_iota_results ( v, 99 ));
     
+    v.clear ();
+    boost::algorithm::iota_n ( std::back_inserter(v), 99, 0 );
+    BOOST_CHECK ( v.size() == 0 );
+
 /*
     l.clear (); l.reserve ( 5 );
     boost::algorithm::iota ( l.begin (), l.end (), 123 );