diff --git a/src/Symfony/Component/Yaml/Parser.php b/src/Symfony/Component/Yaml/Parser.php
index a6e39007dfe0f..773837c995588 100644
--- a/src/Symfony/Component/Yaml/Parser.php
+++ b/src/Symfony/Component/Yaml/Parser.php
@@ -537,7 +537,27 @@ private function getNextEmbedBlock($indentation = null, $inSequence = false)
         }
 
         if (null === $indentation) {
-            $newIndent = $this->getCurrentLineIndentation();
+            $newIndent = null;
+            $movements = 0;
+
+            do {
+                $EOF = false;
+
+                // comment-like lines do not influence the indentation depth
+                if ($this->isCurrentLineComment()) {
+                    $EOF = !$this->moveToNextLine();
+
+                    if (!$EOF) {
+                        ++$movements;
+                    }
+                } else {
+                    $newIndent = $this->getCurrentLineIndentation();
+                }
+            } while (!$EOF && null === $newIndent);
+
+            for ($i = 0; $i < $movements; ++$i) {
+                $this->moveToPreviousLine();
+            }
 
             $unindentedEmbedBlock = $this->isStringUnIndentedCollectionItem();
 
@@ -551,6 +571,8 @@ private function getNextEmbedBlock($indentation = null, $inSequence = false)
         $data = array();
         if ($this->getCurrentLineIndentation() >= $newIndent) {
             $data[] = substr($this->currentLine, $newIndent);
+        } elseif ($this->isCurrentLineComment()) {
+            $data[] = $this->currentLine;
         } else {
             $this->moveToPreviousLine();
 
@@ -866,11 +888,15 @@ private function parseBlockScalar($style, $chomping = '', $indentation = 0)
     private function isNextLineIndented()
     {
         $currentIndentation = $this->getCurrentLineIndentation();
-        $EOF = !$this->moveToNextLine();
+        $movements = 0;
 
-        while (!$EOF && $this->isCurrentLineEmpty()) {
+        do {
             $EOF = !$this->moveToNextLine();
-        }
+
+            if (!$EOF) {
+                ++$movements;
+            }
+        } while (!$EOF && ($this->isCurrentLineEmpty() || $this->isCurrentLineComment()));
 
         if ($EOF) {
             return false;
@@ -878,7 +904,9 @@ private function isNextLineIndented()
 
         $ret = $this->getCurrentLineIndentation() > $currentIndentation;
 
-        $this->moveToPreviousLine();
+        for ($i = 0; $i < $movements; ++$i) {
+            $this->moveToPreviousLine();
+        }
 
         return $ret;
     }
@@ -967,19 +995,25 @@ private function cleanup($value)
     private function isNextLineUnIndentedCollection()
     {
         $currentIndentation = $this->getCurrentLineIndentation();
-        $notEOF = $this->moveToNextLine();
+        $movements = 0;
 
-        while ($notEOF && $this->isCurrentLineEmpty()) {
-            $notEOF = $this->moveToNextLine();
-        }
+        do {
+            $EOF = !$this->moveToNextLine();
+
+            if (!$EOF) {
+                ++$movements;
+            }
+        } while (!$EOF && ($this->isCurrentLineEmpty() || $this->isCurrentLineComment()));
 
-        if (false === $notEOF) {
+        if ($EOF) {
             return false;
         }
 
         $ret = $this->getCurrentLineIndentation() === $currentIndentation && $this->isStringUnIndentedCollectionItem();
 
-        $this->moveToPreviousLine();
+        for ($i = 0; $i < $movements; ++$i) {
+            $this->moveToPreviousLine();
+        }
 
         return $ret;
     }
diff --git a/src/Symfony/Component/Yaml/Tests/ParserTest.php b/src/Symfony/Component/Yaml/Tests/ParserTest.php
index 1d35ecc1bd819..73a482b9399c7 100644
--- a/src/Symfony/Component/Yaml/Tests/ParserTest.php
+++ b/src/Symfony/Component/Yaml/Tests/ParserTest.php
@@ -2013,6 +2013,68 @@ public function testEvalRefException()
 EOE;
         $this->parser->parse($yaml);
     }
+
+    /**
+     * @dataProvider indentedMappingData
+     */
+    public function testParseIndentedMappings($yaml, $expected)
+    {
+        $this->assertSame($expected, $this->parser->parse($yaml));
+    }
+
+    public function indentedMappingData()
+    {
+        $tests = array();
+
+        $yaml = <<<YAML
+foo:
+  - bar: "foobar"
+    # A comment
+    baz: "foobaz"
+YAML;
+        $expected = array(
+            'foo' => array(
+                array(
+                    'bar' => 'foobar',
+                    'baz' => 'foobaz',
+                ),
+            ),
+        );
+        $tests['comment line is first line in indented block'] = array($yaml, $expected);
+
+        $yaml = <<<YAML
+foo:
+    - bar:
+        # comment
+        baz: [1, 2, 3]
+YAML;
+        $expected = array(
+            'foo' => array(
+                array(
+                    'bar' => array(
+                        'baz' => array(1, 2, 3),
+                    ),
+                ),
+            ),
+        );
+        $tests['mapping value on new line starting with a comment line'] = array($yaml, $expected);
+
+        $yaml = <<<YAML
+foo:
+  -
+    bar: foobar
+YAML;
+        $expected = array(
+            'foo' => array(
+                array(
+                    'bar' => 'foobar',
+                ),
+            ),
+        );
+        $tests['mapping in sequence starting on a new line'] = array($yaml, $expected);
+
+        return $tests;
+    }
 }
 
 class B