diff --git a/core/Translate.php b/core/Translate.php
index adc3379cf4cb25737d29f5f23404d3521c651b9a..1877478679fcc42a477c2c4e3c8a2ff628149c42 100644
--- a/core/Translate.php
+++ b/core/Translate.php
@@ -38,6 +38,12 @@ class Piwik_Translate
 		$this->setLocale();
 		$this->englishLanguageLoaded = true;
 	}
+	
+	public function unloadEnglishTranslation()
+	{
+		$GLOBALS['Piwik_translations'] = array();
+		$this->englishLanguageLoaded = false;
+	}
 
 	public function loadUserTranslation()
 	{
diff --git a/plugins/Referers/images/searchEngines/search.yahoo.com.png b/plugins/Referers/images/searchEngines/search.yahoo.com.png
index 20ba5ed665b6204d96209c9185ae5e8ac7e5960f..1c1d11bc91b6fee17fd65964b534a1bd0d3ab73e 100644
Binary files a/plugins/Referers/images/searchEngines/search.yahoo.com.png and b/plugins/Referers/images/searchEngines/search.yahoo.com.png differ
diff --git a/plugins/Referers/images/searchEngines/www.alexa.com.png b/plugins/Referers/images/searchEngines/www.alexa.com.png
index 61855bc7709d5dfcbe57dedef97e7c4c11dc2304..da07a4398a179e40a46c84a0d807754660c39991 100644
Binary files a/plugins/Referers/images/searchEngines/www.alexa.com.png and b/plugins/Referers/images/searchEngines/www.alexa.com.png differ
diff --git a/tests/core/Piwik.test.php b/tests/core/Piwik.test.php
index 3b60a6d29108fa7f2d0dbb72ee2f108ab4ca1fc1..95a2ab9ac94df895be1c24c611fd607583667dcd 100644
--- a/tests/core/Piwik.test.php
+++ b/tests/core/Piwik.test.php
@@ -44,4 +44,25 @@ class Test_Piwik extends UnitTestCase
     	$this->assertTrue( Piwik::secureDiv( 11.0, 'a' ) === 0 );
     	
     }
+    
+    public function test_getPrettyTimeFromSeconds()
+    {
+    	Piwik_Translate::getInstance()->loadEnglishTranslation();
+    	$tests = array(
+    		30 => '30s',
+    		60 => '1 min 0s',
+    		100 => '1 min 40s',
+    		3600 => '1 hours 0 min',
+    		3700 => '1 hours 1 min',
+    		86400 + 3600 * 10 => '1 days 10 hours',
+    		86400 * 365 => '365 days 0 hours',
+    		(86400 * (365.25 + 10)) => '1 years 10 days',
+    		
+    	);
+    	foreach($tests as $seconds => $expected)
+    	{
+    		$this->assertEqual( Piwik::getPrettyTimeFromSeconds($seconds), str_replace(' ',' ', $expected));
+    	}
+    	Piwik_Translate::getInstance()->unloadEnglishTranslation();
+    }
 }