diff --git a/src/Symfony/Component/Cache/Adapter/TagAwareAdapter.php b/src/Symfony/Component/Cache/Adapter/TagAwareAdapter.php
index fd810f726e..8bcf57e82c 100644
--- a/src/Symfony/Component/Cache/Adapter/TagAwareAdapter.php
+++ b/src/Symfony/Component/Cache/Adapter/TagAwareAdapter.php
@@ -160,7 +160,14 @@ class TagAwareAdapter implements TagAwareAdapterInterface, TagAwareCacheInterfac
         if (!$this->pool->hasItem($key)) {
             return false;
         }
-        if (!$itemTags = $this->pool->getItem(static::TAGS_PREFIX.$key)->get()) {
+
+        $itemTags = $this->pool->getItem(static::TAGS_PREFIX.$key);
+
+        if (!$itemTags->isHit()) {
+            return false;
+        }
+
+        if (!$itemTags = $itemTags->get()) {
             return true;
         }
 
@@ -300,7 +307,10 @@ class TagAwareAdapter implements TagAwareAdapterInterface, TagAwareCacheInterfac
             }
 
             unset($tagKeys[$key]);
-            $itemTags[$key] = $item->get() ?: [];
+
+            if ($item->isHit()) {
+                $itemTags[$key] = $item->get() ?: [];
+            }
 
             if (!$tagKeys) {
                 $tagVersions = $this->getTagVersions($itemTags);
diff --git a/src/Symfony/Component/Cache/Tests/Adapter/TagAwareAdapterTest.php b/src/Symfony/Component/Cache/Tests/Adapter/TagAwareAdapterTest.php
index ef939bae8c..b4e1ebbcd8 100644
--- a/src/Symfony/Component/Cache/Tests/Adapter/TagAwareAdapterTest.php
+++ b/src/Symfony/Component/Cache/Tests/Adapter/TagAwareAdapterTest.php
@@ -99,6 +99,84 @@ class TagAwareAdapterTest extends AdapterTestCase
         $this->assertTrue($pool->getItem('foo')->isHit());
     }
 
+    public function testTagEntryIsCreatedForItemWithoutTags()
+    {
+        $pool = $this->createCachePool();
+
+        $itemKey = 'foo';
+        $item = $pool->getItem($itemKey);
+        $pool->save($item);
+
+        $adapter = new FilesystemAdapter();
+        $this->assertTrue($adapter->hasItem(TagAwareAdapter::TAGS_PREFIX.$itemKey));
+    }
+
+    public function testHasItemReturnsFalseWhenPoolDoesNotHaveItemTags()
+    {
+        $pool = $this->createCachePool();
+
+        $itemKey = 'foo';
+        $item = $pool->getItem($itemKey);
+        $pool->save($item);
+
+        $anotherPool = $this->createCachePool();
+
+        $adapter = new FilesystemAdapter();
+        $adapter->deleteItem(TagAwareAdapter::TAGS_PREFIX.$itemKey); //simulate item losing tags pair
+
+        $this->assertFalse($anotherPool->hasItem($itemKey));
+    }
+
+    public function testGetItemReturnsCacheMissWhenPoolDoesNotHaveItemTags()
+    {
+        $pool = $this->createCachePool();
+
+        $itemKey = 'foo';
+        $item = $pool->getItem($itemKey);
+        $pool->save($item);
+
+        $anotherPool = $this->createCachePool();
+
+        $adapter = new FilesystemAdapter();
+        $adapter->deleteItem(TagAwareAdapter::TAGS_PREFIX.$itemKey); //simulate item losing tags pair
+
+        $item = $anotherPool->getItem($itemKey);
+        $this->assertFalse($item->isHit());
+    }
+
+    public function testHasItemReturnsFalseWhenPoolDoesNotHaveItemAndOnlyHasTags()
+    {
+        $pool = $this->createCachePool();
+
+        $itemKey = 'foo';
+        $item = $pool->getItem($itemKey);
+        $pool->save($item);
+
+        $anotherPool = $this->createCachePool();
+
+        $adapter = new FilesystemAdapter();
+        $adapter->deleteItem($itemKey); //simulate losing item but keeping tags
+
+        $this->assertFalse($anotherPool->hasItem($itemKey));
+    }
+
+    public function testGetItemReturnsCacheMissWhenPoolDoesNotHaveItemAndOnlyHasTags()
+    {
+        $pool = $this->createCachePool();
+
+        $itemKey = 'foo';
+        $item = $pool->getItem($itemKey);
+        $pool->save($item);
+
+        $anotherPool = $this->createCachePool();
+
+        $adapter = new FilesystemAdapter();
+        $adapter->deleteItem($itemKey); //simulate losing item but keeping tags
+
+        $item = $anotherPool->getItem($itemKey);
+        $this->assertFalse($item->isHit());
+    }
+
     /**
      * @return MockObject|PruneableCacheInterface
      */
diff --git a/src/Symfony/Component/PropertyInfo/Extractor/ReflectionExtractor.php b/src/Symfony/Component/PropertyInfo/Extractor/ReflectionExtractor.php
index c7a96d4bf9..d2f1a51508 100644
--- a/src/Symfony/Component/PropertyInfo/Extractor/ReflectionExtractor.php
+++ b/src/Symfony/Component/PropertyInfo/Extractor/ReflectionExtractor.php
@@ -119,8 +119,8 @@ class ReflectionExtractor implements PropertyListExtractorInterface, PropertyTyp
             if (!$propertyName || isset($properties[$propertyName])) {
                 continue;
             }
-            if (!$reflectionClass->hasProperty($propertyName) && !preg_match('/^[A-Z]{2,}/', $propertyName)) {
-                $propertyName = lcfirst($propertyName);
+            if ($reflectionClass->hasProperty($lowerCasedPropertyName = lcfirst($propertyName)) || (!$reflectionClass->hasProperty($propertyName) && !preg_match('/^[A-Z]{2,}/', $propertyName))) {
+                $propertyName = $lowerCasedPropertyName;
             }
             $properties[$propertyName] = $propertyName;
         }
diff --git a/src/Symfony/Component/PropertyInfo/Tests/Extractor/ReflectionExtractorTest.php b/src/Symfony/Component/PropertyInfo/Tests/Extractor/ReflectionExtractorTest.php
index fe8d52a3c5..8b2d087be8 100644
--- a/src/Symfony/Component/PropertyInfo/Tests/Extractor/ReflectionExtractorTest.php
+++ b/src/Symfony/Component/PropertyInfo/Tests/Extractor/ReflectionExtractorTest.php
@@ -67,6 +67,8 @@ class ReflectionExtractorTest extends TestCase
                 '123',
                 'self',
                 'realParent',
+                'xTotals',
+                'YT',
                 'c',
                 'd',
                 'e',
diff --git a/src/Symfony/Component/PropertyInfo/Tests/Fixtures/Dummy.php b/src/Symfony/Component/PropertyInfo/Tests/Fixtures/Dummy.php
index 9bd856bd47..460c08d362 100644
--- a/src/Symfony/Component/PropertyInfo/Tests/Fixtures/Dummy.php
+++ b/src/Symfony/Component/PropertyInfo/Tests/Fixtures/Dummy.php
@@ -93,6 +93,16 @@ class Dummy extends ParentDummy
      */
     public $j;
 
+    /**
+     * @var array
+     */
+    private $xTotals;
+
+    /**
+     * @var string
+     */
+    private $YT;
+
     /**
      * This should not be removed.
      *
@@ -181,4 +191,18 @@ class Dummy extends ParentDummy
     public function setRealParent(parent $realParent)
     {
     }
+
+    /**
+     * @return array
+     */
+    public function getXTotals()
+    {
+    }
+
+    /**
+     * @return string
+     */
+    public function getYT()
+    {
+    }
 }