gistfile1.diff

diff --git a/lib/Cake/View/Helper.php b/lib/Cake/View/Helper.php
index f198f82..fb2952d 100644
--- a/lib/Cake/View/Helper.php
+++ b/lib/Cake/View/Helper.php
@@ -267,15 +267,29 @@ class Helper extends Object {
  * @param array $options Options array. Possible keys:
  * 	`fullBase` Return full url with domain name
  * 	`pathPrefix` Path prefix for relative urls
+ *  `ext` Asset extension to append
  * @return string Generated url
  */
 	public function assetUrl($path, array $options) {
 		if (is_array($path)) {
 			$path = $this->url($path);
 		} elseif (strpos($path, '://') === false) {
+			list($plugin, $path) = $this->_View->pluginSplit($path, false);
+
 			if (!empty($options['pathPrefix']) && $path[0] !== '/') {
 				$path = $options['pathPrefix'] . $path;
 			}
+			if (
+				!empty($options['ext']) &&
+				strpos($path, '?') === false &&
+				substr($path, -strlen($options['ext'])) !== $options['ext']
+			) {
+				$path .= $options['ext'];
+			}
+			if ($plugin) {
+				$path = Inflector::underscore($plugin) . DS . $path;
+			}
+
 			$path = $this->assetTimestamp($this->webroot($path));
 		}