diff --git a/src/examples/triangle.rs b/src/examples/triangle.rs
index d455b468..8b9da177 100644
--- a/src/examples/triangle.rs
+++ b/src/examples/triangle.rs
@@ -24,7 +24,6 @@ use glfw::Context;
 use std::cast;
 use std::mem;
 use std::ptr;
-use std::slice;
 use std::str;
 
 // Vertex data
@@ -69,9 +68,9 @@ fn compile_shader(src: &str, ty: GLenum) -> GLuint {
         if status != (gl::TRUE as GLint) {
             let mut len = 0;
             gl::GetShaderiv(shader, gl::INFO_LOG_LENGTH, &mut len);
-            let mut buf = slice::from_elem(len as uint - 1, 0u8);     // subtract 1 to skip the trailing null character
+            let mut buf = Vec::from_elem(len as uint - 1, 0u8);     // subtract 1 to skip the trailing null character
             gl::GetShaderInfoLog(shader, len, ptr::mut_null(), buf.as_mut_ptr() as *mut GLchar);
-            fail!(str::from_utf8_owned(buf).expect("ShaderInfoLog not valid utf8"));
+            fail!("{}", str::from_utf8(buf.as_slice()).expect("ShaderInfoLog not valid utf8"));
         }
     }
     shader
@@ -91,9 +90,9 @@ fn link_program(vs: GLuint, fs: GLuint) -> GLuint {
         if status != (gl::TRUE as GLint) {
             let mut len: GLint = 0;
             gl::GetProgramiv(program, gl::INFO_LOG_LENGTH, &mut len);
-            let mut buf = slice::from_elem(len as uint - 1, 0u8);     // subtract 1 to skip the trailing null character
+            let mut buf = Vec::from_elem(len as uint - 1, 0u8);     // subtract 1 to skip the trailing null character
             gl::GetProgramInfoLog(program, len, ptr::mut_null(), buf.as_mut_ptr() as *mut GLchar);
-            fail!(str::from_utf8_owned(buf).expect("ProgramInfoLog not valid utf8"));
+            fail!("{}", str::from_utf8(buf.as_slice()).expect("ProgramInfoLog not valid utf8"));
         }
     }
     program
diff --git a/src/gen/main.rs b/src/gen/main.rs
index 6c65702b..bce21577 100644
--- a/src/gen/main.rs
+++ b/src/gen/main.rs
@@ -69,7 +69,7 @@ fn main() {
         return;
     }
 
-    let ns = match args.opt_str("namespace").unwrap_or(~"gl").as_slice() {
+    let ns = match args.opt_str("namespace").unwrap_or("gl".to_owned()).as_slice() {
         "gl"  => Gl,
         "glx" => fail!("glx generation unimplemented"),
         "wgl" => fail!("wgl generation unimplemented"),
@@ -85,9 +85,9 @@ fn main() {
     } else {
         Some(Filter {
             extensions: args.opt_strs("extension"),
-            profile: args.opt_str("profile").unwrap_or(~"core"),
-            version: args.opt_str("version").unwrap_or(~"4.3"),
-            api: args.opt_str("api").unwrap_or(~"gl"),
+            profile: args.opt_str("profile").unwrap_or("core".to_owned()),
+            version: args.opt_str("version").unwrap_or("4.3".to_owned()),
+            api: args.opt_str("api").unwrap_or("gl".to_owned()),
         })
     };
 
@@ -115,13 +115,13 @@ fn gen_binding_ident(binding: &Binding, use_idents: bool) -> ~str {
     // fixed
     if use_idents {
         match binding.ident.as_slice() {
-            "in" => ~"in_",
-            "ref" => ~"ref_",
-            "type" => ~"type_",
+            "in" => "in_".to_owned(),
+            "ref" => "ref_".to_owned(),
+            "type" => "type_".to_owned(),
             ident => ident.to_owned(),
         }
     } else {
-        ~"_"
+        "_".to_owned()
     }
 }
 
diff --git a/src/gen/registry.rs b/src/gen/registry.rs
index 3b6774fe..550456a5 100644
--- a/src/gen/registry.rs
+++ b/src/gen/registry.rs
@@ -314,8 +314,8 @@ impl<'a> RegistryBuilder {
             match self.recv() {
                 // ignores
                 Characters(_) | Comment(_) => (),
-                StartElement(ref s, _) if s.as_slice() == "comment" => self.skip_until(EndElement(~"comment")),
-                StartElement(ref s, _) if s.as_slice() == "types" => self.skip_until(EndElement(~"types")),
+                StartElement(ref s, _) if s.as_slice() == "comment" => self.skip_until(EndElement("comment".to_owned())),
+                StartElement(ref s, _) if s.as_slice() == "types" => self.skip_until(EndElement("types".to_owned())),
 
                 // add groups
                 StartElement(ref s, _) if s.as_slice() == "groups" => {
@@ -428,8 +428,8 @@ impl<'a> RegistryBuilder {
 
                 Registry {
                     groups: groups,
-                    enums: enums.move_iter().filter(|e| desired_enums.contains(&(~"GL_" + e.ident))).collect::<Vec<Enum>>(),
-                    cmds: cmds.move_iter().filter(|c| desired_cmds.contains(&(~"gl" + c.proto.ident))).collect::<Vec<Cmd>>(),
+                    enums: enums.move_iter().filter(|e| desired_enums.contains(&("GL_".to_owned() + e.ident))).collect::<Vec<Enum>>(),
+                    cmds: cmds.move_iter().filter(|c| desired_cmds.contains(&("gl".to_owned() + c.proto.ident))).collect::<Vec<Cmd>>(),
                     // these aren't important after this step
                     features: Vec::new(),
                     extensions: Vec::new(),
@@ -512,7 +512,7 @@ impl<'a> RegistryBuilder {
             match self.recv() {
                 // ignores
                 Characters(_) | Comment(_) => (),
-                StartElement(ref s, _) if s.as_slice() == "unused" => self.skip_until(EndElement(~"unused")),
+                StartElement(ref s, _) if s.as_slice() == "unused" => self.skip_until(EndElement("unused".to_owned())),
 
                 // add enum definition
                 StartElement(ref s, ref atts) if s.as_slice() == "enum" => {
diff --git a/src/gen/ty.rs b/src/gen/ty.rs
index e946febe..6ffb8b86 100644
--- a/src/gen/ty.rs
+++ b/src/gen/ty.rs
@@ -15,7 +15,7 @@
 
 pub fn to_return_suffix(ty: &str) -> ~str {
     match ty {
-        "c_void" | "VOID" | "GLvoid" => ~"",
+        "c_void" | "VOID" | "GLvoid" => "".to_owned(),
         ty_str => " -> " + ty_str.replace("*mut ", "*"),
     }
 }