diff --git a/src/Symfony/Component/Yaml/Parser.php b/src/Symfony/Component/Yaml/Parser.php
index 074306969a..fe80c0bd98 100644
--- a/src/Symfony/Component/Yaml/Parser.php
+++ b/src/Symfony/Component/Yaml/Parser.php
@@ -159,7 +159,7 @@ class Parser
                 // hash
                 } elseif (!isset($values['value']) || '' == trim($values['value'], ' ') || 0 === strpos(ltrim($values['value'], ' '), '#')) {
                     // if next line is less indented or equal, then it means that the current value is null
-                    if ($this->isNextLineIndented()) {
+                    if ($this->isNextLineIndented() && !$this->isNextLineUnIndentedCollection()) {
                         $data[$key] = null;
                     } else {
                         $c = $this->getRealCurrentLineNb() + 1;
@@ -275,7 +275,9 @@ class Parser
         if (null === $indentation) {
             $newIndent = $this->getCurrentLineIndentation();
 
-            if (!$this->isCurrentLineEmpty() && 0 == $newIndent) {
+            $unindentedEmbedBlock = $this->isStringUnIndentedCollectionItem($this->currentLine);
+
+            if (!$this->isCurrentLineEmpty() && 0 === $newIndent && !$unindentedEmbedBlock) {
                 throw new ParseException('Indentation problem.', $this->getRealCurrentLineNb() + 1, $this->currentLine);
             }
         } else {
@@ -284,7 +286,15 @@ class Parser
 
         $data = array(substr($this->currentLine, $newIndent));
 
+        $isItUnindentedCollection = $this->isStringUnIndentedCollectionItem($this->currentLine);
+
         while ($this->moveToNextLine()) {
+
+            if ($isItUnindentedCollection && !$this->isStringUnIndentedCollectionItem($this->currentLine)) {
+                $this->moveToPreviousLine();
+                break;
+            }
+
             if ($this->isCurrentLineEmpty()) {
                 if ($this->isCurrentLineBlank()) {
                     $data[] = substr($this->currentLine, $newIndent);
@@ -553,4 +563,47 @@ class Parser
 
         return $value;
     }
+
+    /**
+     * Returns true if the next line starts unindented collection
+     *
+     * @return Boolean Returns true if the next line starts unindented collection, false otherwise
+     */
+    private function isNextLineUnIndentedCollection()
+    {
+        $currentIndentation = $this->getCurrentLineIndentation();
+        $notEOF = $this->moveToNextLine();
+
+        while ($notEOF && $this->isCurrentLineEmpty()) {
+            $notEOF = $this->moveToNextLine();
+        }
+
+        if (false === $notEOF) {
+            return false;
+        }
+
+        $ret = false;
+        if (
+            $this->getCurrentLineIndentation() == $currentIndentation
+            &&
+            $this->isStringUnIndentedCollectionItem($this->currentLine)
+        ) {
+            $ret = true;
+        }
+
+        $this->moveToPreviousLine();
+
+        return $ret;
+    }
+
+    /**
+     * Returns true if the string is unindented collection item
+     *
+     * @return Boolean Returns true if the string is unindented collection item, false otherwise
+     */
+    private function isStringUnIndentedCollectionItem($string)
+    {
+        return (0 === strpos($this->currentLine, '- '));
+    }
+
 }
diff --git a/src/Symfony/Component/Yaml/Tests/Fixtures/index.yml b/src/Symfony/Component/Yaml/Tests/Fixtures/index.yml
index a1d7f39e0b..a471c5271e 100644
--- a/src/Symfony/Component/Yaml/Tests/Fixtures/index.yml
+++ b/src/Symfony/Component/Yaml/Tests/Fixtures/index.yml
@@ -15,3 +15,4 @@
 - YtsNullsAndEmpties
 - YtsSpecificationExamples
 - YtsTypeTransfers
+- unindentedCollections
\ No newline at end of file
diff --git a/src/Symfony/Component/Yaml/Tests/Fixtures/unindentedCollections.yml b/src/Symfony/Component/Yaml/Tests/Fixtures/unindentedCollections.yml
new file mode 100644
index 0000000000..fd8ad7ed44
--- /dev/null
+++ b/src/Symfony/Component/Yaml/Tests/Fixtures/unindentedCollections.yml
@@ -0,0 +1,62 @@
+--- %YAML:1.0
+test: Unindented collection
+brief: >
+    Unindented collection
+yaml: |
+    collection:
+    - item1
+    - item2
+    - item3
+php: |
+    array('collection' => array('item1', 'item2', 'item3'))
+---
+test: Nested unindented collection (two levels)
+brief: >
+    Nested unindented collection
+yaml: |
+    collection:
+        key:
+        - a
+        - b
+        - c
+php: |
+    array('collection' => array('key' => array('a', 'b', 'c')))
+---
+test: Nested unindented collection (three levels)
+brief: >
+    Nested unindented collection
+yaml: |
+    collection:
+        key:
+            subkey:
+            - one
+            - two
+            - three
+php: |
+    array('collection' => array('key' => array('subkey' => array('one', 'two', 'three'))))
+---
+test: Key/value after unindented collection (1)
+brief: >
+    Key/value after unindented collection (1)
+yaml: |
+    collection:
+        key:
+        - a
+        - b
+        - c
+    foo: bar
+php: |
+    array('collection' => array('key' => array('a', 'b', 'c')), 'foo' => 'bar')
+---
+test: Key/value after unindented collection (at the same level)
+brief: >
+    Key/value after unindented collection
+yaml: |
+    collection:
+        key:
+        - a
+        - b
+        - c
+        foo: bar
+php: |
+    array('collection' => array('key' => array('a', 'b', 'c'), 'foo' => 'bar'))
diff --git a/src/Symfony/Component/Yaml/Tests/ParserTest.php b/src/Symfony/Component/Yaml/Tests/ParserTest.php
index 98689ae6bd..6b4e2d482b 100644
--- a/src/Symfony/Component/Yaml/Tests/ParserTest.php
+++ b/src/Symfony/Component/Yaml/Tests/ParserTest.php
@@ -140,6 +140,26 @@ EOF
             }
         }
     }
+
+    /**
+     *
+     * @expectedException Symfony\Component\Yaml\Exception\ParseException
+     *
+     */
+    public function testUnindentedCollectionException()
+    {
+        $yaml = <<<EOF
+
+collection:
+-item1
+-item2
+-item3
+
+EOF;
+
+        $this->parser->parse($yaml);
+    }
+
 }
 
 class B