diff --git a/src/Symfony/Component/DomCrawler/Crawler.php b/src/Symfony/Component/DomCrawler/Crawler.php
index c2be6d9348..c3954946ad 100644
--- a/src/Symfony/Component/DomCrawler/Crawler.php
+++ b/src/Symfony/Component/DomCrawler/Crawler.php
@@ -441,7 +441,7 @@ class Crawler extends \SplObjectStorage
         $nodes = array();
 
         while ($node = $node->parentNode) {
-            if (1 === $node->nodeType) {
+            if (1 === $node->nodeType && '_root' !== $node->nodeName) {
                 $nodes[] = $node;
             }
         }
@@ -584,13 +584,15 @@ class Crawler extends \SplObjectStorage
      */
     public function filterXPath($xpath)
     {
-        $crawler = new static(null, $this->uri);
+        $document = new \DOMDocument('1.0', 'UTF-8');
+        $root = $document->appendChild($document->createElement('_root'));
         foreach ($this as $node) {
-            $domxpath = new \DOMXPath($node->ownerDocument);
-            $crawler->add($domxpath->query($xpath, $node));
+            $root->appendChild($document->importNode($node, true));
         }
 
-        return $crawler;
+        $domxpath = new \DOMXPath($document);
+
+        return new static($domxpath->query($xpath), $this->uri);
     }
 
     /**
diff --git a/src/Symfony/Component/DomCrawler/Field/FormField.php b/src/Symfony/Component/DomCrawler/Field/FormField.php
index 27fb5f06a8..6412272c2e 100644
--- a/src/Symfony/Component/DomCrawler/Field/FormField.php
+++ b/src/Symfony/Component/DomCrawler/Field/FormField.php
@@ -52,7 +52,13 @@ abstract class FormField
     {
         $this->node = $node;
         $this->name = $node->getAttribute('name');
-        $this->xpath = new \DOMXPath($node->ownerDocument);
+
+        $this->document = new \DOMDocument('1.0', 'UTF-8');
+        $this->node = $this->document->importNode($this->node, true);
+
+        $root = $this->document->appendChild($this->document->createElement('_root'));
+        $root->appendChild($this->node);
+        $this->xpath = new \DOMXPath($this->document);
 
         $this->initialize();
     }
diff --git a/src/Symfony/Component/DomCrawler/Form.php b/src/Symfony/Component/DomCrawler/Form.php
index 03f6980b34..2649d6d33b 100644
--- a/src/Symfony/Component/DomCrawler/Form.php
+++ b/src/Symfony/Component/DomCrawler/Form.php
@@ -378,7 +378,9 @@ class Form extends Link implements \ArrayAccess
     {
         $this->fields = new FormFieldRegistry();
 
-        $xpath = new \DOMXPath($this->node->ownerDocument);
+        $document = new \DOMDocument('1.0', 'UTF-8');
+        $xpath = new \DOMXPath($document);
+        $root = $document->appendChild($document->createElement('_root'));
 
         // add submitted button if it has a valid name
         if ('form' !== $this->button->nodeName && $this->button->hasAttribute('name') && $this->button->getAttribute('name')) {
@@ -388,33 +390,39 @@ class Form extends Link implements \ArrayAccess
 
                 // temporarily change the name of the input node for the x coordinate
                 $this->button->setAttribute('name', $name.'.x');
-                $this->set(new Field\InputFormField($this->button));
+                $this->set(new Field\InputFormField($document->importNode($this->button, true)));
 
                 // temporarily change the name of the input node for the y coordinate
                 $this->button->setAttribute('name', $name.'.y');
-                $this->set(new Field\InputFormField($this->button));
+                $this->set(new Field\InputFormField($document->importNode($this->button, true)));
 
                 // restore the original name of the input node
                 $this->button->setAttribute('name', $name);
-            } else {
-                $this->set(new Field\InputFormField($this->button));
+            }
+            else {
+                $this->set(new Field\InputFormField($document->importNode($this->button, true)));
             }
         }
 
         // find form elements corresponding to the current form
         if ($this->node->hasAttribute('id')) {
+            // traverse through the whole document
+            $node = $document->importNode($this->node->ownerDocument->documentElement, true);
+            $root->appendChild($node);
+
             // corresponding elements are either descendants or have a matching HTML5 form attribute
             $formId = Crawler::xpathLiteral($this->node->getAttribute('id'));
-
-            // do the xpath query without $this->node as the context node (i.e. traverse through the whole document)
-            $fieldNodes = $xpath->query(sprintf('descendant::input[@form=%s] | descendant::button[@form=%s] | descendant::textarea[@form=%s] | descendant::select[@form=%s] | //form[@id=%s]//input[not(@form)] | //form[@id=%s]//button[not(@form)] | //form[@id=%s]//textarea[not(@form)] | //form[@id=%s]//select[not(@form)]', $formId, $formId, $formId, $formId, $formId, $formId, $formId, $formId));
+            $fieldNodes = $xpath->query(sprintf('descendant::input[@form=%s] | descendant::button[@form=%s] | descendant::textarea[@form=%s] | descendant::select[@form=%s] | //form[@id=%s]//input[not(@form)] | //form[@id=%s]//button[not(@form)] | //form[@id=%s]//textarea[not(@form)] | //form[@id=%s]//select[not(@form)]', $formId, $formId, $formId, $formId, $formId, $formId, $formId, $formId), $root);
             foreach ($fieldNodes as $node) {
                 $this->addField($node);
             }
         } else {
-            // do the xpath query with $this->node as the context node, to only find descendant elements
-            // however, descendant elements with form attribute are not part of this form
-            $fieldNodes = $xpath->query('descendant::input[not(@form)] | descendant::button[not(@form)] | descendant::textarea[not(@form)] | descendant::select[not(@form)]', $this->node);
+            // parent form has no id, add descendant elements only
+            $node = $document->importNode($this->node, true);
+            $root->appendChild($node);
+
+            // descendant elements with form attribute are not part of this form
+            $fieldNodes = $xpath->query('descendant::input[not(@form)] | descendant::button[not(@form)] | descendant::textarea[not(@form)] | descendant::select[not(@form)]', $root);
             foreach ($fieldNodes as $node) {
                 $this->addField($node);
             }
diff --git a/src/Symfony/Component/DomCrawler/Tests/CrawlerTest.php b/src/Symfony/Component/DomCrawler/Tests/CrawlerTest.php
index 867b24613c..1c22398025 100644
--- a/src/Symfony/Component/DomCrawler/Tests/CrawlerTest.php
+++ b/src/Symfony/Component/DomCrawler/Tests/CrawlerTest.php
@@ -378,10 +378,8 @@ EOF
         $this->assertInstanceOf('Symfony\\Component\\DomCrawler\\Crawler', $crawler, '->filterXPath() returns a new instance of a crawler');
 
         $crawler = $this->createTestCrawler()->filterXPath('//ul');
-        $this->assertCount(6, $crawler->filterXPath('//li'), '->filterXPath() filters the node list with the XPath expression');
 
-        $crawler = $this->createTestCrawler();
-        $this->assertCount(3, $crawler->filterXPath('//body')->filterXPath('//button')->parents(), '->filterXpath() preserves parents when chained');
+        $this->assertCount(6, $crawler->filterXPath('//li'), '->filterXPath() filters the node list with the XPath expression');
     }
 
     /**