diff --git a/lib/Cake/Test/Case/View/HelperTest.php b/lib/Cake/Test/Case/View/HelperTest.php
index 564b6dc20..b588fda7e 100644
--- a/lib/Cake/Test/Case/View/HelperTest.php
+++ b/lib/Cake/Test/Case/View/HelperTest.php
@@ -660,6 +660,9 @@ class HelperTest extends CakeTestCase {
 
 		$result = $this->Helper->assetUrl('foo.jpg?one=two&three=four');
 		$this->assertEquals('foo.jpg?one=two&three=four', $result);
+
+		$result = $this->Helper->assetUrl('dir/big+tall/image', array('ext' => '.jpg'));
+		$this->assertEquals('dir/big%2Btall/image.jpg', $result);
 	}
 
 /**
@@ -674,7 +677,8 @@ class HelperTest extends CakeTestCase {
 			'here' => '/cake_dev/index.php/tasks',
 		));
 		$result = $this->Helper->assetUrl('img/cake.icon.png', array('fullBase' => true));
-		$this->assertEquals('http://localhost/cake_dev/app/webroot/img/cake.icon.png', $result);
+
+		$this->assertEquals($result, 'http://' . $_SERVER['HTTP_HOST'] . '/cake_dev/app/webroot/img/cake.icon.png');
 	}
 
 /**
diff --git a/lib/Cake/View/Helper.php b/lib/Cake/View/Helper.php
index 847f5d841..52f779601 100644
--- a/lib/Cake/View/Helper.php
+++ b/lib/Cake/View/Helper.php
@@ -341,7 +341,7 @@ class Helper extends Object {
  */
 	protected function _encodeUrl($url) {
 		$path = parse_url($url, PHP_URL_PATH);
-		$parts = array_map('urldecode', explode('/', $path));
+		$parts = array_map('rawurldecode', explode('/', $path));
 		$parts = array_map('rawurlencode', $parts);
 		$encoded = implode('/', $parts);
 		return h(str_replace($path, $encoded, $url));