diff --git a/src/servo/content.rs b/src/servo/content.rs
index 562787e1a30..cad907151cf 100644
--- a/src/servo/content.rs
+++ b/src/servo/content.rs
@@ -62,7 +62,7 @@ fn content(to_layout: chan<layout_task::Msg>) -> chan<ControlMsg> {
                 let css_port = comm::port();
                 let css_chan = comm::chan(css_port);
                 task::spawn {||
-                    let new_file <- new_file;
+                    let new_file = copy new_file;
                     let css_stream = spawn_css_lexer_task(~new_file);
                     let css_rules = build_stylesheet(css_stream);
                     css_chan.send(css_rules);
@@ -70,7 +70,7 @@ fn content(to_layout: chan<layout_task::Msg>) -> chan<ControlMsg> {
 
                 // Note: we can parse the next document in parallel
                 // with any previous documents.
-                let stream = spawn_html_parser_task(filename);
+                let stream = spawn_html_parser_task(copy filename);
                 let root = build_dom(scope, stream);
            
                 // Collect the css stylesheet
diff --git a/src/servo/engine.rs b/src/servo/engine.rs
index d3ebb745380..1256f565b6b 100644
--- a/src/servo/engine.rs
+++ b/src/servo/engine.rs
@@ -20,7 +20,7 @@ fn engine<S:renderer::sink send copy>(sink: S) -> chan<Msg> {
         loop {
             alt self_ch.recv() {
               LoadURLMsg(url) {
-                let url <- url;
+                let url = copy url;
                 if (*url).ends_with(".js") {
                     content.send(content::ExecuteMsg(url))
                 } else {
diff --git a/src/servo/gfx/renderer.rs b/src/servo/gfx/renderer.rs
index f0ee72ee244..d0e5cff42aa 100644
--- a/src/servo/gfx/renderer.rs
+++ b/src/servo/gfx/renderer.rs
@@ -68,7 +68,7 @@ fn draw_display_list(
             draw_solid_color(draw_target, item, r, g, b);
           }
           dl::display_item_image(image) {
-            draw_image(draw_target, item, image);
+            draw_image(draw_target, item, copy image);
           }
           dl::display_item_text(text_run) {
             draw_text(draw_target, item, text_run);
diff --git a/src/servo/layout/box_builder.rs b/src/servo/layout/box_builder.rs
index 1678e5075e7..e495cfd1e36 100644
--- a/src/servo/layout/box_builder.rs
+++ b/src/servo/layout/box_builder.rs
@@ -156,7 +156,7 @@ impl box_builder_priv for Node {
     fn determine_box_kind() -> BoxKind {
         alt self.read({ |n| copy n.kind }) {
             ~Text(string) {
-                TextBox(@text_box(string))
+                TextBox(@text_box(copy string))
             }
             ~Element(element) {
                 alt *element.kind {
diff --git a/src/servo/layout/layout_task.rs b/src/servo/layout/layout_task.rs
index b9babb8a148..3857f8e419b 100644
--- a/src/servo/layout/layout_task.rs
+++ b/src/servo/layout/layout_task.rs
@@ -38,7 +38,7 @@ fn layout(to_renderer: chan<renderer::Msg>) -> chan<Msg> {
                     node.dump();
 
                     node.initialize_style_for_subtree();
-                    node.recompute_style_for_subtree(arc(styles));
+                    node.recompute_style_for_subtree(arc(copy styles));
 
                     let this_box = node.construct_boxes();
                     this_box.dump();
diff --git a/src/servo/layout/style/matching.rs b/src/servo/layout/style/matching.rs
index fb073565224..d60cddf6660 100644
--- a/src/servo/layout/style/matching.rs
+++ b/src/servo/layout/style/matching.rs
@@ -184,7 +184,7 @@ impl matching_methods for Node {
         // information as we go.
 
         for styles.each { |sty|
-            let (selectors, decls) <- *(copy sty);
+            let (selectors, decls) = copy *sty;
             for selectors.each { |sel|
                 if self.matches_selector(sel) {
                     for decls.each { |decl| 
diff --git a/src/servo/opts.rs b/src/servo/opts.rs
index 694af73cbaa..278b3f2fdfd 100644
--- a/src/servo/opts.rs
+++ b/src/servo/opts.rs
@@ -26,7 +26,7 @@ fn from_cmdline_args(args: [str]) -> opts {
     ];
 
     let match = alt getopts::getopts(args, opts) {
-      result::ok(m) { let m <- m; m }
+      result::ok(m) { copy m }
       result::err(f) { fail getopts::fail_str(f) }
     };
 
@@ -37,7 +37,7 @@ fn from_cmdline_args(args: [str]) -> opts {
     };
 
     let render_mode = alt getopts::opt_maybe_str(match, "o") {
-      some(output_file) { let output_file <- output_file; png(output_file) }
+      some(output_file) { png(copy output_file) }
       none { screen }
     };
 
diff --git a/src/servo/parser/css_builder.rs b/src/servo/parser/css_builder.rs
index 6020b3fb76a..19b1abcca82 100644
--- a/src/servo/parser/css_builder.rs
+++ b/src/servo/parser/css_builder.rs
@@ -17,7 +17,7 @@ type token_reader = {stream : port<token>, mut lookahead : option<token>};
 impl methods for token_reader {
     fn get() -> token {
         alt copy self.lookahead {
-          some(tok)  { self.lookahead = none; let t <- tok; t }
+          some(tok)  { self.lookahead = none; copy tok }
           none       { recv(self.stream) }
         }
     }
@@ -31,7 +31,7 @@ impl methods for token_reader {
 fn parse_element(reader : token_reader) -> option<~selector> {
     // Get the current element type
     let elmt_name = alt reader.get() {
-      to_elmt(tag)  { let t <- tag; t }
+      to_elmt(tag)  { copy tag }
       to_eof        { ret none; }
       _             { fail "Expected an element" }
     };
@@ -42,7 +42,7 @@ fn parse_element(reader : token_reader) -> option<~selector> {
     loop {
         let tok = reader.get();
         alt tok {
-          to_attr(attr)       { let a <- attr; attr_list += [a]; }
+          to_attr(attr)       { attr_list += [copy attr]; }
           to_start_desc | to_descendant | to_child | to_sibling 
           | to_comma {
             reader.unget(tok); 
@@ -68,7 +68,7 @@ fn parse_rule(reader : token_reader) -> option<~rule> {
         let mut cur_sel;
 
         alt parse_element(reader) {
-          some(elmt)  { cur_sel <- elmt; }
+          some(elmt)  { cur_sel = copy elmt; }
           none        { ret none; } // we hit an eof in the middle of a rule
         }
 
@@ -79,7 +79,7 @@ fn parse_rule(reader : token_reader) -> option<~rule> {
                 alt parse_element(reader) {
                   some(elmt)   { 
                     let built_sel <- cur_sel;
-                    let new_sel <- elmt;
+                    let new_sel = copy elmt;
                     cur_sel <- ~descendant(built_sel, new_sel)
                   }
                   none         { ret none; }
@@ -89,7 +89,7 @@ fn parse_rule(reader : token_reader) -> option<~rule> {
                 alt parse_element(reader) {
                   some(elmt)   { 
                     let built_sel <- cur_sel;
-                    let new_sel <- elmt;
+                    let new_sel = copy elmt;
                     cur_sel <- ~child(built_sel, new_sel)
                   }
                   none         { ret none; }
@@ -99,7 +99,7 @@ fn parse_rule(reader : token_reader) -> option<~rule> {
                 alt parse_element(reader) {
                   some(elmt)   { 
                     let built_sel <- cur_sel;
-                    let new_sel <- elmt;
+                    let new_sel = copy elmt;
                     cur_sel <- ~sibling(built_sel, new_sel)
                   }
                   none         { ret none; }
@@ -186,7 +186,7 @@ fn build_stylesheet(stream : port<token>) -> [~rule] {
 
     loop {
         alt parse_rule(reader) {
-          some(rule)   { let r <- rule; rule_list += [r]; }
+          some(rule)   { rule_list += [copy rule]; }
           none         { break; }
         }
     }
diff --git a/src/servo/parser/html_builder.rs b/src/servo/parser/html_builder.rs
index 0dd6c8a5491..db9df7a5e6f 100644
--- a/src/servo/parser/html_builder.rs
+++ b/src/servo/parser/html_builder.rs
@@ -76,13 +76,13 @@ fn build_dom(scope: NodeScope, stream: port<token>) -> Node {
             parser::to_start_opening_tag(tag_name) {
                 #debug["starting tag %s", tag_name];
                 let element_kind = build_element_kind(tag_name);
-                let new_node = scope.new_node(Element(ElementData(tag_name, element_kind)));
+                let new_node = scope.new_node(Element(ElementData(copy tag_name, element_kind)));
                 scope.add_child(cur, new_node);
                 cur = new_node;
             }
             parser::to_attr(key, value) {
                 #debug["attr: %? = %?", key, value];
-                link_up_attribute(scope, cur, key, value);
+                link_up_attribute(scope, cur, copy key, copy value);
             }
             parser::to_end_opening_tag {
                 #debug("end opening tag");
@@ -94,8 +94,7 @@ fn build_dom(scope: NodeScope, stream: port<token>) -> Node {
                 cur = scope.get_parent(cur).get();
             }
             parser::to_text(s) if !s.is_whitespace() {
-                let s <- s;
-                let new_node = scope.new_node(Text(s));
+                let new_node = scope.new_node(Text(copy s));
                 scope.add_child(cur, new_node);
             }
             parser::to_text(_) {
diff --git a/src/servo/parser/lexer.rs b/src/servo/parser/lexer.rs
index 42ac0aef9b3..0ed11685254 100644
--- a/src/servo/parser/lexer.rs
+++ b/src/servo/parser/lexer.rs
@@ -480,7 +480,7 @@ fn spawn_html_parser_task(-filename: ~str) -> port<html::token> {
     let result_port = port();
     let result_chan = chan(result_port);
     task::spawn {||
-        let filename <- *filename;
+        let filename = copy *filename;
         assert (copy filename).ends_with(".html");
         let file_data = io::read_whole_file(filename).get();
         let reader = io::bytes_reader(file_data);
@@ -502,7 +502,7 @@ fn spawn_css_lexer_task(-filename: ~str) -> port<css::token> {
     let result_port = port();
     let result_chan = chan(result_port);
     task::spawn {||
-        let filename <- *filename;
+        let filename = copy *filename;
 
         assert (copy filename).ends_with(".css");
         let file_try = io::read_whole_file(filename);
diff --git a/src/servo/servo.rs b/src/servo/servo.rs
index fbe767f93cf..1031a417ac6 100644
--- a/src/servo/servo.rs
+++ b/src/servo/servo.rs
@@ -65,7 +65,7 @@ fn run_pipeline_png(-url: str, outfile: str) {
     listen {|pngdata|
         let sink = pngsink::pngsink(pngdata);
         let engine = engine::engine(sink);
-        let url <- url;
+        let url = copy url;
         engine.send(engine::LoadURLMsg(~url));
         alt io::buffered_file_writer(outfile) {
           result::ok(writer) {