diff --git a/src/lib.rs b/src/lib.rs
index 033d72c2..2e3bda31 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -576,7 +576,7 @@ pub fn inv_rotate<V, M: Rotate<V>>(m: &M, v: &V) -> V {
 
 /// Rotates a copy of `m` by `amount` using `center` as the pivot point.
 #[inline(always)]
-pub fn append_rotation_wrt_point<LV: Neg<LV>,
+pub fn append_rotation_wrt_point<LV: Neg<LV> + Copy,
                                  AV,
                                  M: RotationWithTranslation<LV, AV>>(
                                  m:      &M,
@@ -587,7 +587,7 @@ pub fn append_rotation_wrt_point<LV: Neg<LV>,
 
 /// Rotates a copy of `m` by `amount` using `m.translation()` as the pivot point.
 #[inline(always)]
-pub fn append_rotation_wrt_center<LV: Neg<LV>,
+pub fn append_rotation_wrt_center<LV: Neg<LV> + Copy,
                                   AV,
                                   M: RotationWithTranslation<LV, AV>>(
                                   m:      &M,
diff --git a/src/structs/dvec.rs b/src/structs/dvec.rs
index 02cbc5b6..e99b1524 100644
--- a/src/structs/dvec.rs
+++ b/src/structs/dvec.rs
@@ -4,7 +4,7 @@
 
 use std::rand::Rand;
 use std::rand;
-use std::slice::{Items, MutItems};
+use std::slice::{Iter, IterMut};
 use std::iter::FromIterator;
 use traits::operations::{ApproxEq, Axpy};
 use traits::geometry::{Dot, Norm};
diff --git a/src/structs/dvec_macros.rs b/src/structs/dvec_macros.rs
index 4d67fc96..8ee1f762 100644
--- a/src/structs/dvec_macros.rs
+++ b/src/structs/dvec_macros.rs
@@ -110,14 +110,14 @@ macro_rules! dvec_impl(
 
         impl<N> Iterable<N> for $dvec<N> {
             #[inline]
-            fn iter<'l>(&'l self) -> Items<'l, N> {
+            fn iter<'l>(&'l self) -> Iter<'l, N> {
                 self.as_slice().iter()
             }
         }
 
         impl<N> IterableMut<N> for $dvec<N> {
             #[inline]
-            fn iter_mut<'l>(&'l mut self) -> MutItems<'l, N> {
+            fn iter_mut<'l>(&'l mut self) -> IterMut<'l, N> {
                 self.as_mut_slice().iter_mut()
             }
         }
@@ -250,9 +250,9 @@ macro_rules! dvec_impl(
             }
         }
 
-        impl<N: Neg<N> + Zero> Neg<$dvec<N>> for $dvec<N> {
+        impl<N: Neg<N> + Zero + Copy> Neg<$dvec<N>> for $dvec<N> {
             #[inline]
-            fn neg(&self) -> $dvec<N> {
+            fn neg(self) -> $dvec<N> {
                 FromIterator::from_iter(self.as_slice().iter().map(|a| -*a))
             }
         }
diff --git a/src/structs/mat.rs b/src/structs/mat.rs
index d48b911b..7db026e8 100644
--- a/src/structs/mat.rs
+++ b/src/structs/mat.rs
@@ -4,7 +4,7 @@
 
 use std::mem;
 use traits::operations::ApproxEq;
-use std::slice::{Items, MutItems};
+use std::slice::{Iter, IterMut};
 use structs::vec::{Vec1, Vec2, Vec3, Vec4, Vec5, Vec6};
 use structs::pnt::{Pnt1, Pnt4, Pnt5, Pnt6};
 use structs::dvec::{DVec1, DVec2, DVec3, DVec4, DVec5, DVec6};
diff --git a/src/structs/mat_macros.rs b/src/structs/mat_macros.rs
index 78ac9851..9d91d5e5 100644
--- a/src/structs/mat_macros.rs
+++ b/src/structs/mat_macros.rs
@@ -181,7 +181,7 @@ macro_rules! iterable_impl(
   ($t: ident, $dim: expr) => (
     impl<N> Iterable<N> for $t<N> {
         #[inline]
-        fn iter<'l>(&'l self) -> Items<'l, N> {
+        fn iter<'l>(&'l self) -> Iter<'l, N> {
             unsafe {
                 mem::transmute::<&'l $t<N>, &'l [N, ..$dim * $dim]>(self).iter()
             }
@@ -194,7 +194,7 @@ macro_rules! iterable_mut_impl(
   ($t: ident, $dim: expr) => (
     impl<N> IterableMut<N> for $t<N> {
         #[inline]
-        fn iter_mut<'l>(&'l mut self) -> MutItems<'l, N> {
+        fn iter_mut<'l>(&'l mut self) -> IterMut<'l, N> {
             unsafe {
                 mem::transmute::<&'l mut $t<N>, &'l mut [N, ..$dim * $dim]>(self).iter_mut()
             }
diff --git a/src/structs/pnt.rs b/src/structs/pnt.rs
index 4b77a39e..06dcb11d 100644
--- a/src/structs/pnt.rs
+++ b/src/structs/pnt.rs
@@ -3,7 +3,7 @@
 #![allow(missing_docs)] // we allow missing to avoid having to document the point components.
 
 use std::mem;
-use std::slice::{Items, MutItems};
+use std::slice::{Iter, IterMut};
 use std::iter::{Iterator, FromIterator};
 use traits::operations::{ApproxEq, POrd, POrdering, Axpy, ScalarAdd, ScalarSub, ScalarMul,
                          ScalarDiv};
diff --git a/src/structs/quat.rs b/src/structs/quat.rs
index e975f813..464884f0 100644
--- a/src/structs/quat.rs
+++ b/src/structs/quat.rs
@@ -5,7 +5,7 @@
 use std::mem;
 use std::num;
 use std::rand::{Rand, Rng};
-use std::slice::{Items, MutItems};
+use std::slice::{Iter, IterMut};
 use structs::{Vec3, Pnt3, Rot3, Mat3};
 use traits::operations::{ApproxEq, Inv, POrd, POrdering, Axpy, ScalarAdd, ScalarSub, ScalarMul,
                          ScalarDiv};
@@ -54,7 +54,7 @@ impl<N> Quat<N> {
     }
 }
 
-impl<N: Neg<N>> Quat<N> {
+impl<N: Neg<N> + Copy> Quat<N> {
     /// Replaces this quaternion by its conjugate.
     #[inline]
     pub fn conjugate(&mut self) {
diff --git a/src/structs/rot.rs b/src/structs/rot.rs
index cc5da36d..09ecea2a 100644
--- a/src/structs/rot.rs
+++ b/src/structs/rot.rs
@@ -18,7 +18,7 @@ pub struct Rot2<N> {
     submat: Mat2<N>
 }
 
-impl<N: Clone + BaseFloat + Neg<N>> Rot2<N> {
+impl<N: Clone + BaseFloat + Neg<N> + Copy> Rot2<N> {
     /// Builds a 2 dimensional rotation matrix from an angle in radian.
     pub fn new(angle: Vec1<N>) -> Rot2<N> {
         let (sia, coa) = angle.x.sin_cos();
@@ -66,7 +66,7 @@ impl<N: BaseFloat + Clone> Rotation<Vec1<N>> for Rot2<N> {
     }
 }
 
-impl<N: Clone + Rand + BaseFloat + Neg<N>> Rand for Rot2<N> {
+impl<N: Clone + Rand + BaseFloat + Neg<N> + Copy> Rand for Rot2<N> {
     #[inline]
     fn rand<R: Rng>(rng: &mut R) -> Rot2<N> {
         Rot2::new(rng.gen())
diff --git a/src/structs/spec/vec0.rs b/src/structs/spec/vec0.rs
index 8e8c6da5..683b3e12 100644
--- a/src/structs/spec/vec0.rs
+++ b/src/structs/spec/vec0.rs
@@ -1,5 +1,5 @@
 use std::mem;
-use std::slice::{Items, MutItems};
+use std::slice::{Iter, IterMut};
 use std::iter::{Iterator, FromIterator};
 use traits::operations::ApproxEq;
 use traits::structure::{Iterable, IterableMut, Indexable, Basis, Dim, Shape, BaseFloat, BaseNum,
@@ -66,14 +66,14 @@ impl<N> Indexable<uint, N> for vec::Vec0<N> {
 
 impl<N: 'static> Iterable<N> for vec::Vec0<N> {
     #[inline]
-    fn iter<'l>(&'l self) -> Items<'l, N> {
+    fn iter<'l>(&'l self) -> Iter<'l, N> {
         unsafe { mem::transmute::<&'l vec::Vec0<N>, &'l [N, ..0]>(self).iter() }
     }
 }
 
 impl<N: 'static> IterableMut<N> for vec::Vec0<N> {
     #[inline]
-    fn iter_mut<'l>(&'l mut self) -> MutItems<'l, N> {
+    fn iter_mut<'l>(&'l mut self) -> IterMut<'l, N> {
         unsafe { mem::transmute::<&'l mut vec::Vec0<N>, &'l mut [N, ..0]>(self).iter_mut() }
     }
 }
@@ -112,9 +112,9 @@ impl<N, T> Sub<T, vec::Vec0<N>> for vec::Vec0<N> {
     }
 }
 
-impl<N: Neg<N>> Neg<vec::Vec0<N>> for vec::Vec0<N> {
+impl<N: Neg<N> + Copy> Neg<vec::Vec0<N>> for vec::Vec0<N> {
     #[inline]
-    fn neg(&self) -> vec::Vec0<N> {
+    fn neg(self) -> vec::Vec0<N> {
         vec::Vec0
     }
 }
diff --git a/src/structs/vec.rs b/src/structs/vec.rs
index 1f5c01bf..16e242df 100644
--- a/src/structs/vec.rs
+++ b/src/structs/vec.rs
@@ -3,7 +3,7 @@
 #![allow(missing_docs)] // we allow missing to avoid having to document the dispatch traits.
 
 use std::mem;
-use std::slice::{Items, MutItems};
+use std::slice::{Iter, IterMut};
 use std::iter::{Iterator, FromIterator};
 use traits::operations::{ApproxEq, POrd, POrdering, Axpy, ScalarAdd, ScalarSub, ScalarMul,
                          ScalarDiv, Absolute};
diff --git a/src/structs/vec_macros.rs b/src/structs/vec_macros.rs
index 50fd4d44..f33e0644 100644
--- a/src/structs/vec_macros.rs
+++ b/src/structs/vec_macros.rs
@@ -269,7 +269,7 @@ macro_rules! iterable_impl(
     ($t: ident, $dim: expr) => (
         impl<N> Iterable<N> for $t<N> {
             #[inline]
-            fn iter<'l>(&'l self) -> Items<'l, N> {
+            fn iter<'l>(&'l self) -> Iter<'l, N> {
                 unsafe {
                     mem::transmute::<&'l $t<N>, &'l [N, ..$dim]>(self).iter()
                 }
@@ -282,7 +282,7 @@ macro_rules! iterable_mut_impl(
     ($t: ident, $dim: expr) => (
         impl<N> IterableMut<N> for $t<N> {
             #[inline]
-            fn iter_mut<'l>(&'l mut self) -> MutItems<'l, N> {
+            fn iter_mut<'l>(&'l mut self) -> IterMut<'l, N> {
                 unsafe {
                     mem::transmute::<&'l mut $t<N>, &'l mut [N, ..$dim]>(self).iter_mut()
                 }
@@ -480,9 +480,9 @@ macro_rules! scalar_div_impl(
 
 macro_rules! neg_impl(
     ($t: ident, $comp0: ident $(,$compN: ident)*) => (
-        impl<N: Neg<N>> Neg<$t<N>> for $t<N> {
+        impl<N: Neg<N> + Copy> Neg<$t<N>> for $t<N> {
             #[inline]
-            fn neg(&self) -> $t<N> {
+            fn neg(self) -> $t<N> {
                 $t::new(-self.$comp0 $(, -self.$compN )*)
             }
         }
diff --git a/src/traits/geometry.rs b/src/traits/geometry.rs
index 3ac68557..ac7306cc 100644
--- a/src/traits/geometry.rs
+++ b/src/traits/geometry.rs
@@ -82,7 +82,7 @@ pub trait Rotate<V> {
 ///
 /// Those operations are automatically implemented in term of the `Rotation` and `Translation`
 /// traits.
-pub trait RotationWithTranslation<LV: Neg<LV>, AV>: Rotation<AV> + Translation<LV> {
+pub trait RotationWithTranslation<LV: Neg<LV> + Copy, AV>: Rotation<AV> + Translation<LV> {
     /// Applies a rotation centered on a specific point.
     ///
     /// # Arguments
@@ -136,7 +136,7 @@ pub trait RotationWithTranslation<LV: Neg<LV>, AV>: Rotation<AV> + Translation<L
     }
 }
 
-impl<LV: Neg<LV>, AV, M: Rotation<AV> + Translation<LV>> RotationWithTranslation<LV, AV> for M {
+impl<LV: Neg<LV> + Copy, AV, M: Rotation<AV> + Translation<LV>> RotationWithTranslation<LV, AV> for M {
 }
 
 /// Trait of transformation having a rotation extractable as a rotation matrix. This can typically
diff --git a/src/traits/structure.rs b/src/traits/structure.rs
index c3870936..76a9beca 100644
--- a/src/traits/structure.rs
+++ b/src/traits/structure.rs
@@ -3,7 +3,7 @@
 use std::f32;
 use std::f64;
 use std::num::{Int, Float, FloatMath};
-use std::slice::{Items, MutItems};
+use std::slice::{Iter, IterMut};
 use traits::operations::{RMul, LMul, Axpy, Transpose, Inv, Absolute};
 use traits::geometry::{Dot, Norm, Orig};
 
@@ -209,7 +209,7 @@ pub trait Indexable<I, Res>: Shape<I, Res> + IndexMut<I, Res> {
 /// Traits of objects which can be iterated through like a vector.
 pub trait Iterable<N> {
     /// Gets a vector-like read-only iterator.
-    fn iter<'l>(&'l self) -> Items<'l, N>;
+    fn iter<'l>(&'l self) -> Iter<'l, N>;
 }
 
 /// This is a workaround of current Rust limitations.
@@ -217,7 +217,7 @@ pub trait Iterable<N> {
 /// Traits of mutable objects which can be iterated through like a vector.
 pub trait IterableMut<N> {
     /// Gets a vector-like read-write iterator.
-    fn iter_mut<'l>(&'l mut self) -> MutItems<'l, N>;
+    fn iter_mut<'l>(&'l mut self) -> IterMut<'l, N>;
 }
 
 /*