diff --git a/src/servo/dom/base.rs b/src/servo/dom/base.rs
index 19435e7ae7b..0e39cfae8a6 100644
--- a/src/servo/dom/base.rs
+++ b/src/servo/dom/base.rs
@@ -11,11 +11,11 @@ enum node_data = {
 };
 
 enum node_kind {
-    nk_element(element),
-    nk_text(str)
+    Element(ElementData),
+    Text(str)
 }
 
-class element {
+class ElementData {
     let tag_name: str;
     let subclass: ~element_subclass;
     let attrs: dvec<~attr>;
@@ -34,7 +34,8 @@ class element {
             }
             i += 1u;
         }
-        ret none;
+
+        none
     }
 }
 
diff --git a/src/servo/layout/base.rs b/src/servo/layout/base.rs
index d9d74c149bd..84d65e83024 100644
--- a/src/servo/layout/base.rs
+++ b/src/servo/layout/base.rs
@@ -1,6 +1,6 @@
 #[doc="Fundamental layout structures and algorithms."]
 
-import dom::base::{element, es_div, es_img, node_data, node_kind, node};
+import dom::base::{Element, es_div, es_img, node_data, node_kind, node};
 import dom::rcu;
 import dom::rcu::reader_methods;
 import gfx::geometry;
@@ -145,8 +145,8 @@ impl node_methods for node {
 
 #[cfg(test)]
 mod test {
-    import dom::base::{element, es_div, es_img, methods, nk_element, node_data,
-                       node_kind, node, wr_tree_ops};
+    import dom::base::{ElementData, es_div, es_img, methods, Element, node_data, node_kind, node};
+    import dom::base::{wr_tree_ops};
     import dom::rcu::scope;
     import box_builder::{box_builder_methods};
 
@@ -183,10 +183,10 @@ mod test {
             ~es_img({mut size: size})
         }
 
-        let n0 = s.new_node(nk_element(element("img", mk_img(Size2D(au(10),au(10))))));
-        let n1 = s.new_node(nk_element(element("img", mk_img(Size2D(au(10),au(10))))));
-        let n2 = s.new_node(nk_element(element("img", mk_img(Size2D(au(10),au(20))))));
-        let n3 = s.new_node(nk_element(element("div", ~es_div)));
+        let n0 = s.new_node(Element(ElementData("img", mk_img(Size2D(au(10),au(10))))));
+        let n1 = s.new_node(Element(ElementData("img", mk_img(Size2D(au(10),au(10))))));
+        let n2 = s.new_node(Element(ElementData("img", mk_img(Size2D(au(10),au(20))))));
+        let n3 = s.new_node(Element(ElementData("div", ~es_div)));
 
         tree::add_child(s, n3, n0);
         tree::add_child(s, n3, n1);
diff --git a/src/servo/layout/box_builder.rs b/src/servo/layout/box_builder.rs
index 5eb268a5e63..7457c228a9a 100644
--- a/src/servo/layout/box_builder.rs
+++ b/src/servo/layout/box_builder.rs
@@ -1,6 +1,6 @@
 #[doc="Creates CSS boxes from a DOM."]
 
-import dom::base::{element, es_div, es_img, nk_element, nk_text, node};
+import dom::base::{ElementData, es_div, es_img, Element, Text, node};
 import dom::style::{display_type, di_block, di_inline, di_none};
 import dom::rcu::reader_methods;
 import gfx::geometry;
@@ -20,8 +20,7 @@ enum ctxt = {
     // The parent box that these boxes will be added to.
     parent_box: @box,
 
-    // The current anonymous box that we're currently appending inline nodes
-    // to.
+    // The current anonymous box that we're currently appending inline nodes to.
     //
     // See CSS2 9.2.1.1.
     mut anon_box: option<@box>
@@ -61,8 +60,7 @@ impl methods for ctxt {
                 self.finish_anonymous_box_if_necessary();
             }
 
-            // Add the child's box to the current enclosing box or the current
-            // anonymous box.
+            // Add the child's box to the current enclosing box or the current anonymous box.
             alt kid.get_computed_style().display {
                 di_block { 
                   btree.add_child(self.parent_box, kid_box);
@@ -70,11 +68,14 @@ impl methods for ctxt {
                 di_inline {
                     let anon_box = alt self.anon_box {
                         none {
-                          // the anonymous box inherits the attributes
-                          // of its parents for now, so that
-                          // properties of intrinsic boxes are not
-                          // spread to their parenting anonymous box.
+                          //
+                          // the anonymous box inherits the attributes of its parents for now, so
+                          // that properties of intrinsic boxes are not spread to their parenting
+                          // anonymous box.
+                          //
                           // TODO: check what css actually specifies
+                          //
+
                           let b = new_box(self.parent_node, bk_inline);
                           self.anon_box = some(b);
                           b
@@ -159,8 +160,8 @@ impl box_builder_priv for node {
     "]
     fn determine_box_kind() -> box_kind {
         alt self.rd({ |n| copy n.kind }) {
-            ~nk_text(string) { bk_text(@text_box(string)) }
-            ~nk_element(element) {
+            ~Text(string) { bk_text(@text_box(string)) }
+            ~Element(element) {
                 alt *element.subclass {
                     es_div         { bk_block            }
                     es_img({size}) { bk_intrinsic(@size) }
diff --git a/src/servo/layout/style/apply.rs b/src/servo/layout/style/apply.rs
index 4c6bc769aaf..2cb1700f3d7 100644
--- a/src/servo/layout/style/apply.rs
+++ b/src/servo/layout/style/apply.rs
@@ -1,5 +1,5 @@
 #[doc="Applies style to boxes."]
-import dom::base::{es_img, nk_element, node};
+import dom::base::{es_img, Element, node};
 import dom::rcu::reader_methods;
 import image::base::load;
 import layout::base::*;
@@ -20,11 +20,11 @@ impl apply_style_methods for @box {
         self.node.rd {
             |node|
             alt node.kind {
-              ~nk_element(element) {
+              ~Element(element) {
                 let style = self.node.get_computed_style();
 
                 self.appearance.background_color = some(style.back_color);
-                
+
                 alt element.subclass {
                   ~es_img(*) {
                     alt element.get_attr("src") {
@@ -34,8 +34,7 @@ impl apply_style_methods for @box {
                         // FIXME: Don't load synchronously!
                         #debug("loading image from %s", url);
                         let image = @load(url);
-                        self.appearance.background_image =
-                            some(image);
+                        self.appearance.background_image = some(image);
                       }
                       none {
                         /* Ignore. */
diff --git a/src/servo/layout/style/matching.rs b/src/servo/layout/style/matching.rs
index 43ee3b22c3b..b9340343149 100644
--- a/src/servo/layout/style/matching.rs
+++ b/src/servo/layout/style/matching.rs
@@ -1,17 +1,16 @@
 #[doc="Perform css selector matching"]
 
-import dom::base::{node, nk_element, nk_text};
-import dom::style::{selector, style_decl, font_size, display, text_color,
-                    background_color, stylesheet, element, child, descendant,
-                    sibling, attr, exact, exists, includes, starts_with};
+import dom::base::{node, Element, ElementData, Text};
+import dom::style::{selector, style_decl, font_size, display, text_color, background_color,
+                    stylesheet, element, child, descendant, sibling, attr, exact, exists, includes,
+                    starts_with};
 import dom::rcu::{reader_methods};
 import style::{computed_style, default_style_for_node_kind};
 import base::{layout_data};
 
 export matching_methods;
 
-#[doc="Update the computed style of an html element with a style specified
-       by css."]
+#[doc="Update the computed style of an HTML element with a style specified by CSS."]
 fn update_style(style : @computed_style, decl : style_decl) {
     alt decl {
       display(dis)           { (*style).display = dis; }
@@ -20,8 +19,8 @@ fn update_style(style : @computed_style, decl : style_decl) {
     }
 }
 
-#[doc="Check if a css attribute matches the attribute of an html element."]
-fn attrs_match(attr : attr, elmt : dom::base::element) -> bool {
+#[doc="Check if a CSS attribute matches the attribute of an HTML element."]
+fn attrs_match(attr: attr, elmt: ElementData) -> bool {
     alt attr {
       exists(name) {
         alt elmt.get_attr(name) {
@@ -56,22 +55,25 @@ fn attrs_match(attr : attr, elmt : dom::base::element) -> bool {
             if value.len() == val.len() { ret true; }
             else { ret value.starts_with(val + "-"); }
           }
-          none       { ret false; }
+          none {
+            ret false;
+          }
         }
       }
     }
 }
 
 impl priv_matching_methods for node {
-    #[doc="Checks if the given css selector, which must describe a single
-           element with no relational information, describes the given
-           html element."]
-    fn matches_element(sel : ~selector) -> bool {
+    #[doc="
+        Checks if the given CSS selector, which must describe a single element with no relational
+        information, describes the given HTML element.
+    "]
+    fn matches_element(sel: ~selector) -> bool {
         alt *sel {
           child(_, _) | descendant(_, _) | sibling(_, _) { ret false; }
           element(tag, attrs) {
             alt self.rd { |n| copy *n.kind } {
-                nk_element(elmt) {
+                Element(elmt) {
                     if !(tag == "*" || tag == elmt.tag_name) {
                         ret false;
                     }
@@ -84,7 +86,7 @@ impl priv_matching_methods for node {
 
                     ret true;
                 }
-                nk_text(str)   { /*fall through, currently unsupported*/ }
+                Text(str)   { /*fall through, currently unsupported*/ }
             }
           }
         }
@@ -93,7 +95,7 @@ impl priv_matching_methods for node {
                    //unsupported.
     }
 
-    #[doc = "Checks if a generic css selector matches a given html element"]
+    #[doc = "Checks if a generic CSS selector matches a given HTML element"]
     fn matches_selector(sel : ~selector) -> bool {
         alt *sel {
           element(str, atts) { ret self.matches_element(sel); }
@@ -202,17 +204,16 @@ impl matching_methods for node {
 }
 
 mod test {
-    import dom::base::{node_scope, methods, nk_element, attr, es_div,
-                       es_img, es_unknown, es_head, wr_tree_ops};
+    import dom::base::{node_scope, methods, Element, attr, es_div, es_img, es_unknown, es_head};
+    import dom::base::{wr_tree_ops};
     import dvec::{dvec, extensions};
     import io::println;
 
-    fn new_node_from_attr(scope : node_scope, -name : str, -val : str) -> node
-    {
-        let elmt = dom::base::element("div", ~es_div);
+    fn new_node_from_attr(scope: node_scope, -name: str, -val: str) -> node {
+        let elmt = ElementData("div", ~es_div);
         let attr = ~attr(name, val);
         elmt.attrs.push(attr);
-        ret scope.new_node(nk_element(elmt));        
+        ret scope.new_node(Element(elmt));
     }
 
     #[test]
@@ -222,7 +223,7 @@ mod test {
 
         let sel = element("*", [starts_with("lang", "en")]);
 
-        assert node.matches_selector(~sel);        
+        assert node.matches_selector(~sel);
     }
 
     #[test]
@@ -232,7 +233,7 @@ mod test {
 
         let sel = element("*", [starts_with("lang", "en")]);
 
-        assert node.matches_selector(~sel);        
+        assert node.matches_selector(~sel);
     }
     
     #[test] 
@@ -242,7 +243,7 @@ mod test {
 
         let sel = element("*", [starts_with("lang", "en")]);
 
-        assert !node.matches_selector(~sel);        
+        assert !node.matches_selector(~sel);
     }
 
     #[test]
diff --git a/src/servo/layout/style/style.rs b/src/servo/layout/style/style.rs
index 498ee7685d0..0d95d940078 100644
--- a/src/servo/layout/style/style.rs
+++ b/src/servo/layout/style/style.rs
@@ -1,9 +1,7 @@
 #[doc="High-level interface to CSS selector matching."]
 
-import dom::style::{display_type, di_block, di_inline, di_none, 
-                    stylesheet};
-import dom::base::{element, es_div, es_head, es_img, nk_element, nk_text};
-import dom::base::{node};
+import dom::style::{display_type, di_block, di_inline, di_none, stylesheet};
+import dom::base::{es_div, es_head, es_img, Element, Text, node};
 import dom::base::node_kind;
 import dom::rcu::reader_methods;
 import layout::base::*; // FIXME: resolve bug requires *
@@ -17,21 +15,20 @@ type computed_style = {mut display : display_type,
 #[doc="Returns the default style for the given node kind."]
 fn default_style_for_node_kind(kind: node_kind) -> computed_style {
     alt kind {
-      nk_text(*) {
+      Text(*) {
         {mut display: di_inline, 
-         mut back_color : white()}
+         mut back_color: white()}
       }
-      nk_element(element) {
+      Element(element) {
         let r = rand::rng();
         let rand_color = rgb(r.next() as u8, r.next() as u8, r.next() as u8);
 
         alt *element.subclass {
-          es_div { {mut display : di_block,
-                    mut back_color : rand_color} }
-          es_head { {mut display : di_none, mut back_color : rand_color} }
-          es_img(*) { {mut display : di_inline, mut back_color : rand_color} }
-          es_unknown { {mut display : di_inline, mut back_color : 
-                            rand_color} }
+          es_div { {mut display: di_block,
+                    mut back_color: rand_color} }
+          es_head { {mut display: di_none, mut back_color: rand_color} }
+          es_img(*) { {mut display: di_inline, mut back_color: rand_color} }
+          es_unknown { {mut display: di_inline, mut back_color: rand_color} }
         }
       }
     }
@@ -41,9 +38,8 @@ impl style_priv for node {
     #[doc="
         Performs CSS selector matching on a node.
         
-        This is, importantly, the function that creates the layout data for
-        the node (the reader-auxiliary box in the RCU model) and populates it
-        with the computed style.
+        This is, importantly, the function that creates the layout data for the node (the reader-
+        auxiliary box in the RCU model) and populates it with the computed style.
     "]
     fn recompute_style(styles : stylesheet) {
         let style = self.match_css_style(styles);
@@ -63,8 +59,8 @@ impl style_priv for node {
 
 impl style_methods for node {
     #[doc="
-        Returns the computed style for the given node. If CSS selector matching
-        has not yet been performed, fails.
+        Returns the computed style for the given node. If CSS selector matching has not yet been
+        performed, fails.
 
         TODO: Return a safe reference; don't copy.
     "]
@@ -78,9 +74,8 @@ impl style_methods for node {
     #[doc="
         Performs CSS selector matching on a subtree.
 
-        This is, importantly, the function that creates the layout data for
-        the node (the reader-auxiliary box in the RCU model) and populates it
-        with the computed style.
+        This is, importantly, the function that creates the layout data for the node (the reader-
+        auxiliary box in the RCU model) and populates it with the computed style.
 
         TODO: compute the style of multiple nodes in parallel.
     "]
diff --git a/src/servo/parser/html_builder.rs b/src/servo/parser/html_builder.rs
index 738dda8692c..9a21eb8e1f9 100644
--- a/src/servo/parser/html_builder.rs
+++ b/src/servo/parser/html_builder.rs
@@ -1,9 +1,8 @@
 #[doc="Constructs a DOM tree from an incoming token stream."]
 
 import dom::rcu::writer_methods;
-import dom::base::{attr, element, element_subclass, es_div, es_head, es_img};
-import dom::base::{es_unknown, methods, nk_element, nk_text, rd_tree_ops};
-import dom::base::{wr_tree_ops};
+import dom::base::{attr, element_subclass, es_div, es_head, es_img, es_unknown, methods, Element};
+import dom::base::{ElementData, Text, rd_tree_ops, wr_tree_ops};
 import dom = dom::base;
 import dvec::extensions;
 import geom::size::Size2D;
@@ -12,14 +11,12 @@ import gfx::geometry::au;
 import parser = parser::lexer::html;
 import parser::token;
 
-fn link_up_attribute(scope: dom::node_scope, node: dom::node, -key: str,
-                     -value: str) {
-    // TODO: Implement atoms so that we don't always perform string
-    // comparisons.
+fn link_up_attribute(scope: dom::node_scope, node: dom::node, -key: str, -value: str) {
+    // TODO: Implement atoms so that we don't always perform string comparisons.
     scope.rd(node) {
         |node_contents|
         alt *node_contents.kind {
-            dom::nk_element(element) {
+            Element(element) {
                 element.attrs.push(~attr(copy key, copy value));
                 alt *element.subclass {
                     es_img(img) if key == "width" {
@@ -45,7 +42,8 @@ fn link_up_attribute(scope: dom::node_scope, node: dom::node, -key: str,
                     }
                 }
             }
-            dom::nk_text(*) {
+
+            Text(*) {
                 fail "attempt to link up an attribute to a text node"
             }
         }
@@ -66,10 +64,9 @@ fn build_element_subclass(tag_name: str) -> ~element_subclass {
     }
 }
 
-fn build_dom(scope: dom::node_scope,
-             stream: port<token>) -> dom::node {
+fn build_dom(scope: dom::node_scope, stream: port<token>) -> dom::node {
     // The current reference node.
-    let mut cur = scope.new_node(dom::nk_element(element("html", ~es_div)));
+    let mut cur = scope.new_node(Element(ElementData("html", ~es_div)));
     loop {
         let token = stream.recv();
         alt token {
@@ -77,9 +74,7 @@ fn build_dom(scope: dom::node_scope,
             parser::to_start_opening_tag(tag_name) {
                 #debug["starting tag %s", tag_name];
                 let element_subclass = build_element_subclass(tag_name);
-                let new_node =
-                    scope.new_node(dom::nk_element(element(tag_name,
-                                                           element_subclass)));
+                let new_node = scope.new_node(Element(ElementData(tag_name, element_subclass)));
                 scope.add_child(cur, new_node);
                 cur = new_node;
             }
@@ -98,7 +93,7 @@ fn build_dom(scope: dom::node_scope,
             }
             parser::to_text(s) if !s.is_whitespace() {
                 let s <- s;
-                let new_node = scope.new_node(dom::nk_text(s));
+                let new_node = scope.new_node(Text(s));
                 scope.add_child(cur, new_node);
             }
             parser::to_text(_) {
diff --git a/src/servo/util/color.rs b/src/servo/util/color.rs
index d568db4cf57..cced68b91b4 100644
--- a/src/servo/util/color.rs
+++ b/src/servo/util/color.rs
@@ -7,9 +7,17 @@
 import float::round;
 import libc::types::os::arch::c95::c_double;
 import css_colors::*;
+import cmp::eq;
 
 enum Color = {red : u8, green : u8, blue : u8, alpha : float};
 
+impl Color of eq for Color {
+    fn eq(&&other: Color) -> bool {
+        ret self.red == other.red && self.green == other.green && self.blue == other.blue &&
+            self.alpha == other.alpha;
+    }
+}
+
 fn rgba(r : u8, g : u8, b : u8, a : float) -> Color {
     Color({red : r, green : g, blue : b, alpha : a})
 }
@@ -172,55 +180,55 @@ mod test {
 
     #[test]
     fn test_parse_by_name() {
-        assert red() == parse_color("red");
-        assert lime() == parse_color("Lime");
-        assert blue() == parse_color("BLUE");
-        assert green() == parse_color("GreEN");
-        assert white() == parse_color("white");
-        assert black() == parse_color("Black");
-        assert gray() == parse_color("Gray");
-        assert silver() == parse_color("SiLvEr");
-        assert maroon() == parse_color("maroon");
-        assert purple() == parse_color("PURPLE");
-        assert fuschia() == parse_color("FUSCHIA");
-        assert olive() == parse_color("oLiVe");
-        assert yellow() == parse_color("yellow");
-        assert navy() == parse_color("NAVY");
-        assert teal() == parse_color("Teal");
-        assert aqua() == parse_color("Aqua");
+        assert red().eq(parse_color("red"));
+        assert lime().eq(parse_color("Lime"));
+        assert blue().eq(parse_color("BLUE"));
+        assert green().eq(parse_color("GreEN"));
+        assert white().eq(parse_color("white"));
+        assert black().eq(parse_color("Black"));
+        assert gray().eq(parse_color("Gray"));
+        assert silver().eq(parse_color("SiLvEr"));
+        assert maroon().eq(parse_color("maroon"));
+        assert purple().eq(parse_color("PURPLE"));
+        assert fuschia().eq(parse_color("FUSCHIA"));
+        assert olive().eq(parse_color("oLiVe"));
+        assert yellow().eq(parse_color("yellow"));
+        assert navy().eq(parse_color("NAVY"));
+        assert teal().eq(parse_color("Teal"));
+        assert aqua().eq(parse_color("Aqua"));
     }
 
     #[test]
     fn test_parsing_rgb() {
-        assert red() == parse_color("rgb(255,0,0)");
-        assert red() == parse_color("rgba(255,0,0,1.0)");
-        assert red() == parse_color("rgba(255,0,0,1)");
-        assert lime() == parse_color("rgba(0,255,0,1.00)");
-        assert rgb(1u8,2u8,3u8) == parse_color("rgb(1,2,03)");
-        assert rgba(15u8,250u8,3u8,0.5) == parse_color("rgba(15,250,3,.5)");
-        assert rgba(15u8,250u8,3u8,0.5) == parse_color("rgba(15,250,3,0.5)");
+        assert red().eq(parse_color("rgb(255,0,0)"));
+        assert red().eq(parse_color("rgba(255,0,0,1.0)"));
+        assert red().eq(parse_color("rgba(255,0,0,1)"));
+        assert lime().eq(parse_color("rgba(0,255,0,1.00)"));
+        assert rgb(1u8,2u8,3u8).eq(parse_color("rgb(1,2,03)"));
+        assert rgba(15u8,250u8,3u8,0.5).eq(parse_color("rgba(15,250,3,.5)"));
+        assert rgba(15u8,250u8,3u8,0.5).eq(parse_color("rgba(15,250,3,0.5)"));
     }
 
     #[test]
     fn test_parsing_hsl() {
-        assert red() == parse_color("hsl(0,1,.5)");
-        assert lime() == parse_color("hsl(120.0,1.0,.5)");
-        assert blue() == parse_color("hsl(240.0,1.0,.5)");
-        assert green() == parse_color("hsl(120.0,1.0,.25)");
-        assert white() == parse_color("hsl(1.0,1.,1.0)");
-        assert white() == parse_color("hsl(129.0,0.3,1.0)");
-        assert black() == parse_color("hsl(231.2,0.75,0.0)");
-        assert black() == parse_color("hsl(11.2,0.0,0.0)");
-        assert gray() == parse_color("hsl(0.0,0.0,0.5)");
-        assert maroon() == parse_color("hsl(0.0,1.0,0.25)");
-        assert purple() == parse_color("hsl(300.0,1.0,0.25)");
-        assert fuschia() == parse_color("hsl(300,1.0,0.5)");
-        assert olive() == parse_color("hsl(60.,1.0,0.25)");
-        assert yellow() == parse_color("hsl(60.,1.0,0.5)");
-        assert navy() == parse_color("hsl(240.0,1.0,.25)");
-        assert teal() == parse_color("hsl(180.0,1.0,.25)");
-        assert aqua() == parse_color("hsl(180.0,1.0,.5)");
-    }        
+        assert red().eq(parse_color("hsl(0,1,.5)"));
+        assert lime().eq(parse_color("hsl(120.0,1.0,.5)"));
+        assert blue().eq(parse_color("hsl(240.0,1.0,.5)"));
+        assert green().eq(parse_color("hsl(120.0,1.0,.25)"));
+        assert white().eq(parse_color("hsl(1.0,1.,1.0)"));
+        assert white().eq(parse_color("hsl(129.0,0.3,1.0)"));
+        assert black().eq(parse_color("hsl(231.2,0.75,0.0)"));
+        assert black().eq(parse_color("hsl(11.2,0.0,0.0)"));
+        assert gray().eq(parse_color("hsl(0.0,0.0,0.5)"));
+        assert maroon().eq(parse_color("hsl(0.0,1.0,0.25)"));
+        assert purple().eq(parse_color("hsl(300.0,1.0,0.25)"));
+        assert fuschia().eq(parse_color("hsl(300,1.0,0.5)"));
+        assert olive().eq(parse_color("hsl(60.,1.0,0.25)"));
+        assert yellow().eq(parse_color("hsl(60.,1.0,0.5)"));
+        assert navy().eq(parse_color("hsl(240.0,1.0,.25)"));
+        assert teal().eq(parse_color("hsl(180.0,1.0,.25)"));
+        assert aqua().eq(parse_color("hsl(180.0,1.0,.5)"));
+    }
 }