diff --git a/src/relpath/relpath.rs b/src/relpath/relpath.rs
index 8b03c4779..2b194332f 100644
--- a/src/relpath/relpath.rs
+++ b/src/relpath/relpath.rs
@@ -64,14 +64,13 @@ pub fn uumain(args: Vec<String>) -> isize {
     }
 
     let mut suffix_pos = 0;
-    absfrom.components()
-        .zip(absto.components())
-        .take_while(
-            |&(f, t)| if f == t {
-                suffix_pos += 1; true
-            } else {
-                false
-            }).last();
+    for (f, t) in absfrom.components().zip(absto.components()) {
+        if f == t {
+            suffix_pos += 1;
+        } else {
+            break;
+        }
+    }
 
     let mut result = Path::new("");
     absfrom.components().skip(suffix_pos).map(|_| result.push("..")).last();
diff --git a/src/split/split.rs b/src/split/split.rs
index c0a154ad7..1ba74c5e8 100644
--- a/src/split/split.rs
+++ b/src/split/split.rs
@@ -111,7 +111,7 @@ pub fn uumain(args: Vec<String>) -> isize {
 struct Settings {
     prefix: String,
     numeric_suffix: bool,
-    suffix_length: uint,
+    suffix_length: usize,
     input: String,
     strategy: String,
     strategy_param: String,
@@ -124,30 +124,29 @@ struct SplitControl {
 }
 
 trait Splitter {
-    // Factory pattern
-    fn new(_hint: Option<Self>, &Settings) -> Box<Splitter>;
-
     // Consume the current_line and return the consumed string
     fn consume(&mut self, &mut SplitControl) -> String;
 }
 
 struct LineSplitter {
-    saved_lines_to_write: uint,
-    lines_to_write: uint,
+    saved_lines_to_write: usize,
+    lines_to_write: usize,
 }
-
-impl Splitter for LineSplitter {
-    fn new(_: Option<LineSplitter>, settings: &Settings) -> Box<Splitter> {
+impl LineSplitter {
+    fn new(settings: &Settings) -> Box<Splitter> {
         let n = match settings.strategy_param.as_slice().parse() {
             Some(a) => a,
             _ => crash!(1, "invalid number of lines")
         };
-        box LineSplitter {
+        Box::new(LineSplitter {
             saved_lines_to_write: n,
             lines_to_write: n,
-        } as Box<Splitter>
+        }) as Box<Splitter>
     }
 
+}
+
+impl Splitter for LineSplitter {
     fn consume(&mut self, control: &mut SplitControl) -> String {
         self.lines_to_write -= 1;
         if self.lines_to_write == 0 {
@@ -159,42 +158,44 @@ impl Splitter for LineSplitter {
 }
 
 struct ByteSplitter {
-    saved_bytes_to_write: uint,
-    bytes_to_write: uint,
+    saved_bytes_to_write: usize,
+    bytes_to_write: usize,
     break_on_line_end: bool,
     require_whole_line: bool,
 }
 
-impl Splitter for ByteSplitter {
-    fn new(_: Option<ByteSplitter>, settings: &Settings) -> Box<Splitter> {
+impl ByteSplitter {
+    fn new(settings: &Settings) -> Box<Splitter> {
         let mut strategy_param : Vec<char> = settings.strategy_param.chars().collect();
         let suffix = strategy_param.pop().unwrap();
         let multiplier = match suffix {
-            '0'...'9' => 1u,
-            'b' => 512u,
-            'k' => 1024u,
-            'm' => 1024u * 1024u,
+            '0'...'9' => 1us,
+            'b' => 512us,
+            'k' => 1024us,
+            'm' => 1024us * 1024us,
             _ => crash!(1, "invalid number of bytes")
         };
         let n = if suffix.is_alphabetic() {
-            match strategy_param.as_slice().iter().map(|c| *c).collect::<String>().as_slice().parse::<uint>() {
+            match strategy_param.as_slice().iter().map(|c| *c).collect::<String>().as_slice().parse::<usize>() {
                 Some(a) => a,
                 _ => crash!(1, "invalid number of bytes")
             }
         } else {
-            match settings.strategy_param.as_slice().parse::<uint>() {
+            match settings.strategy_param.as_slice().parse::<usize>() {
                 Some(a) => a,
                 _ => crash!(1, "invalid number of bytes")
             }
         };
-        box ByteSplitter {
+        Box::new(ByteSplitter {
             saved_bytes_to_write: n * multiplier,
             bytes_to_write: n * multiplier,
             break_on_line_end: if settings.strategy == "b" { false } else { true },
             require_whole_line: false,
-        } as Box<Splitter>
+        }) as Box<Splitter>
     }
+}
 
+impl Splitter for ByteSplitter {
     fn consume(&mut self, control: &mut SplitControl) -> String {
         let line = control.current_line.clone();
         let n = std::cmp::min(line.as_slice().chars().count(), self.bytes_to_write);
@@ -217,13 +218,13 @@ impl Splitter for ByteSplitter {
 }
 
 // (1, 3) -> "aab"
-fn str_prefix(i: uint, width: uint) -> String {
+fn str_prefix(i: usize, width: usize) -> String {
     let mut c = "".to_string();
     let mut n = i;
     let mut w = width;
     while w > 0 {
         w -= 1;
-        let div = Int::pow(26 as uint, w);
+        let div = Int::pow(26 as usize, w);
         let r = n / div;
         n -= r * div;
         c.push(char::from_u32((r as u32) + 97).unwrap());
@@ -232,13 +233,13 @@ fn str_prefix(i: uint, width: uint) -> String {
 }
 
 // (1, 3) -> "001"
-fn num_prefix(i: uint, width: uint) -> String {
+fn num_prefix(i: usize, width: usize) -> String {
     let mut c = "".to_string();
     let mut n = i;
     let mut w = width;
     while w > 0 {
         w -= 1;
-        let div = Int::pow(10 as uint, w);
+        let div = Int::pow(10 as usize, w);
         let r = n / div;
         n -= r * div;
         c.push(char::from_digit(r, 10).unwrap());
@@ -246,23 +247,23 @@ fn num_prefix(i: uint, width: uint) -> String {
     c
 }
 
-fn split(settings: &Settings) -> int {
+fn split(settings: &Settings) -> isize {
     let mut reader = io::BufferedReader::new(
         if settings.input.as_slice() == "-" {
-            box io::stdio::stdin_raw() as Box<Reader>
+            Box::new(io::stdio::stdin_raw()) as Box<Reader>
         } else {
             let r = match io::File::open(&Path::new(settings.input.clone())) {
                 Ok(a) => a,
                 Err(_) => crash!(1, "cannot open '{}' for reading: No such file or directory", settings.input)
             };
-            box r as Box<Reader>
+            Box::new(r) as Box<Reader>
         }
     );
 
     let mut splitter: Box<Splitter> =
         match settings.strategy.as_slice() {
-            "l" => Splitter::new(None::<LineSplitter>, settings),
-            "b" | "C" => Splitter::new(None::<ByteSplitter>, settings),
+            "l" => LineSplitter::new(settings),
+            "b" | "C" => ByteSplitter::new(settings),
             a @ _ => crash!(1, "strategy {} not supported", a)
         };
 
@@ -271,7 +272,7 @@ fn split(settings: &Settings) -> int {
         request_new_file: true, // Request new file
     };
 
-    let mut writer = io::BufferedWriter::new(box io::stdio::stdout_raw() as Box<Writer>);
+    let mut writer = io::BufferedWriter::new(Box::new(io::stdio::stdout_raw()) as Box<Writer>);
     let mut fileno = 0;
     loop {
         if control.current_line.as_slice().chars().count() == 0 {
@@ -293,7 +294,7 @@ fn split(settings: &Settings) -> int {
                 crash_if_err!(1, writer.flush());
             }
             fileno += 1;
-            writer = io::BufferedWriter::new(box io::File::open_mode(&Path::new(filename.as_slice()), io::Open, io::Write) as Box<Writer>);
+            writer = io::BufferedWriter::new(Box::new(io::File::open_mode(&Path::new(filename.as_slice()), io::Open, io::Write)) as Box<Writer>);
             control.request_new_file = false;
             if settings.verbose {
                 println!("creating file '{}'", filename);
diff --git a/src/tee/tee.rs b/src/tee/tee.rs
index bbb1bc865..d2374af1d 100644
--- a/src/tee/tee.rs
+++ b/src/tee/tee.rs
@@ -1,5 +1,4 @@
 #![crate_name = "tee"]
-#![feature(phase)]
 /*
  * This file is part of the uutils coreutils package.
  *
@@ -66,7 +65,7 @@ fn options(args: &[String]) -> Result<Options, ()> {
             append: m.opt_present("append"),
             ignore_interrupts: m.opt_present("ignore-interrupts"),
             print_and_exit: to_print,
-            files: box names.iter().map(|name| Path::new(name.clone())).collect()
+            files: Box::new(names.iter().map(|name| Path::new(name.clone())).collect())
         })
     }).map_err(|message| warn(message.as_slice()))
 }
@@ -81,7 +80,7 @@ fn exec(options: Options) -> Result<(), ()> {
 fn tee(options: Options) -> Result<(), ()> {
     let writers = options.files.iter().map(|path| open(path, options.append)).collect();
     let output = &mut MultiWriter::new(writers);
-    let input = &mut NamedReader { inner: box stdin() as Box<Reader> };
+    let input = &mut NamedReader { inner: Box::new(stdin()) as Box<Reader> };
     if copy(input, output).is_err() || output.flush().is_err() {
         Err(())
     } else {
@@ -91,15 +90,15 @@ fn tee(options: Options) -> Result<(), ()> {
 
 fn open(path: &Path, append: bool) -> Box<Writer+'static> {
     let inner = if *path == Path::new("-") {
-        box stdout() as Box<Writer>
+        Box::new(stdout()) as Box<Writer>
     } else {
         let mode = if append { Append } else { Truncate };
         match File::open_mode(path, mode, Write) {
-            Ok(file) => box file as Box<Writer>,
-            Err(_) => box NullWriter as Box<Writer>
+            Ok(file) => Box::new(file) as Box<Writer>,
+            Err(_) => Box::new(NullWriter) as Box<Writer>
         }
     };
-    box NamedWriter { inner: inner, path: box path.clone() } as Box<Writer>
+    Box::new(NamedWriter { inner: inner, path: Box::new(path.clone()) }) as Box<Writer>
 }
 
 struct NamedWriter {
@@ -112,7 +111,7 @@ impl Writer for NamedWriter {
         with_path(&*self.path.clone(), || {
             let val = self.inner.write(buf);
             if val.is_err() {
-                self.inner = box NullWriter as Box<Writer>;
+                self.inner = Box::new(NullWriter) as Box<Writer>;
             }
             val
         })
@@ -122,7 +121,7 @@ impl Writer for NamedWriter {
         with_path(&*self.path.clone(), || {
             let val = self.inner.flush();
             if val.is_err() {
-                self.inner = box NullWriter as Box<Writer>;
+                self.inner = Box::new(NullWriter) as Box<Writer>;
             }
             val
         })
@@ -134,14 +133,14 @@ struct NamedReader {
 }
 
 impl Reader for NamedReader {
-    fn read(&mut self, buf: &mut [u8]) -> IoResult<uint> {
+    fn read(&mut self, buf: &mut [u8]) -> IoResult<usize> {
         with_path(&Path::new("stdin"), || {
             self.inner.read(buf)
         })
     }
 }
 
-fn with_path<F, T>(path: &Path, cb: F) -> IoResult<T> where F: Fn() -> IoResult<T> {
+fn with_path<F, T>(path: &Path, mut cb: F) -> IoResult<T> where F: FnMut() -> IoResult<T> {
     match cb() {
         Err(f) => { warn(format!("{}: {}", path.display(), f.to_string()).as_slice()); Err(f) }
         okay => okay
diff --git a/src/unexpand/unexpand.rs b/src/unexpand/unexpand.rs
index 65fa1927e..c862e27e5 100644
--- a/src/unexpand/unexpand.rs
+++ b/src/unexpand/unexpand.rs
@@ -21,9 +21,9 @@ mod util;
 static NAME: &'static str = "unexpand";
 static VERSION: &'static str = "0.0.1";
 
-static DEFAULT_TABSTOP: uint = 8;
+static DEFAULT_TABSTOP: usize = 8;
 
-fn tabstops_parse(s: String) -> Vec<uint> {
+fn tabstops_parse(s: String) -> Vec<usize> {
     let words = s.as_slice().split(',').collect::<Vec<&str>>();
 
     let nums = words.into_iter()
@@ -31,7 +31,7 @@ fn tabstops_parse(s: String) -> Vec<uint> {
             .unwrap_or_else(
                 || crash!(1, "{}\n", "tab size contains invalid character(s)"))
             )
-        .collect::<Vec<uint>>();
+        .collect::<Vec<usize>>();
 
     if nums.iter().any(|&n| n == 0) {
         crash!(1, "{}\n", "tab size cannot be 0");
@@ -47,7 +47,7 @@ fn tabstops_parse(s: String) -> Vec<uint> {
 
 struct Options {
     files: Vec<String>,
-    tabstops: Vec<uint>,
+    tabstops: Vec<usize>,
     aflag: bool
 }
 
@@ -108,24 +108,24 @@ pub fn uumain(args: Vec<String>) -> isize {
 fn open(path: String) -> io::BufferedReader<Box<Reader+'static>> {
     let mut file_buf;
     if path.as_slice() == "-" {
-        io::BufferedReader::new(box io::stdio::stdin_raw() as Box<Reader>)
+        io::BufferedReader::new(Box::new(io::stdio::stdin_raw()) as Box<Reader>)
     } else {
         file_buf = match io::File::open(&Path::new(path.as_slice())) {
             Ok(a) => a,
             _ => crash!(1, "{}: {}\n", path, "No such file or directory")
         };
-        io::BufferedReader::new(box file_buf as Box<Reader>)
+        io::BufferedReader::new(Box::new(file_buf) as Box<Reader>)
     }
 }
 
-fn is_tabstop(tabstops: &[uint], col: uint) -> bool {
+fn is_tabstop(tabstops: &[usize], col: usize) -> bool {
     match tabstops {
         [tabstop] => col % tabstop == 0,
-        tabstops => tabstops.binary_search(|&e| e.cmp(&col)).found().is_some()
+        tabstops => tabstops.binary_search_by(|&e| e.cmp(&col)).is_ok()
     }
 }
 
-fn to_next_stop(tabstops: &[uint], col: uint) -> Option<uint> {
+fn to_next_stop(tabstops: &[usize], col: usize) -> Option<usize> {
     match tabstops {
         [tabstop] => Some(tabstop - col % tabstop),
         tabstops => tabstops.iter().skip_while(|&t| *t <= col).next()
@@ -134,7 +134,7 @@ fn to_next_stop(tabstops: &[uint], col: uint) -> Option<uint> {
 }
 
 fn unexpandspan(mut output: &mut io::LineBufferedWriter<io::stdio::StdWriter>,
-                tabstops: &[uint], nspaces: uint, col: uint, init: bool) {
+                tabstops: &[usize], nspaces: usize, col: usize, init: bool) {
     let mut cur = col - nspaces;
     if nspaces > 1 || init {
         loop {