diff --git a/src/components/script/dom/attr.rs b/src/components/script/dom/attr.rs
index 68300bcb29f..1b49c9f05c2 100644
--- a/src/components/script/dom/attr.rs
+++ b/src/components/script/dom/attr.rs
@@ -13,6 +13,7 @@ use dom::virtualmethods::vtable_for;
 use servo_util::namespace;
 use servo_util::namespace::Namespace;
 use servo_util::str::DOMString;
+use std::cell::Cell;
 
 pub enum AttrSettingType {
     FirstSetAttr,
@@ -29,7 +30,7 @@ pub struct Attr {
     pub prefix: Option<DOMString>,
 
     /// the element that owns this attribute.
-    pub owner: JS<Element>,
+    pub owner: Cell<JS<Element>>,
 }
 
 impl Reflectable for Attr {
@@ -53,7 +54,7 @@ impl Attr {
             name: name, //TODO: Intern attribute names
             namespace: namespace,
             prefix: prefix,
-            owner: owner.unrooted(),
+            owner: Cell::new(owner.unrooted()),
         }
     }
 
@@ -65,7 +66,7 @@ impl Attr {
     }
 
     pub fn set_value(&mut self, set_type: AttrSettingType, value: DOMString) {
-        let mut owner = self.owner.root();
+        let mut owner = self.owner.get().root();
         let node: &mut JSRef<Node> = NodeCast::from_mut_ref(&mut *owner);
         let namespace_is_null = self.namespace == namespace::Null;
 
diff --git a/src/components/script/dom/attrlist.rs b/src/components/script/dom/attrlist.rs
index 8ed4dca07a4..107cd5a184e 100644
--- a/src/components/script/dom/attrlist.rs
+++ b/src/components/script/dom/attrlist.rs
@@ -39,11 +39,11 @@ pub trait AttrListMethods {
 
 impl<'a> AttrListMethods for JSRef<'a, AttrList> {
     fn Length(&self) -> u32 {
-        self.owner.root().attrs.len() as u32
+        self.owner.root().attrs.borrow().len() as u32
     }
 
     fn Item(&self, index: u32) -> Option<Temporary<Attr>> {
-        self.owner.root().attrs.as_slice().get(index as uint).map(|x| Temporary::new(x.clone()))
+        self.owner.root().attrs.borrow().as_slice().get(index as uint).map(|x| Temporary::new(x.clone()))
     }
 
     fn IndexedGetter(&self, index: u32, found: &mut bool) -> Option<Temporary<Attr>> {
diff --git a/src/components/script/dom/clientrectlist.rs b/src/components/script/dom/clientrectlist.rs
index 6072b86df71..6c069807151 100644
--- a/src/components/script/dom/clientrectlist.rs
+++ b/src/components/script/dom/clientrectlist.rs
@@ -18,9 +18,10 @@ pub struct ClientRectList {
 impl ClientRectList {
     pub fn new_inherited(window: &JSRef<Window>,
                          rects: Vec<JSRef<ClientRect>>) -> ClientRectList {
+        let rects = rects.iter().map(|rect| rect.unrooted()).collect();
         ClientRectList {
             reflector_: Reflector::new(),
-            rects: rects.iter().map(|rect| rect.unrooted()).collect(),
+            rects: rects,
             window: window.unrooted(),
         }
     }
@@ -44,8 +45,9 @@ impl<'a> ClientRectListMethods for JSRef<'a, ClientRectList> {
     }
 
     fn Item(&self, index: u32) -> Option<Temporary<ClientRect>> {
-        if index < self.rects.len() as u32 {
-            Some(Temporary::new(self.rects.get(index as uint).clone()))
+        let rects = &self.rects;
+        if index < rects.len() as u32 {
+            Some(Temporary::new(rects.get(index as uint).clone()))
         } else {
             None
         }