RT.diff

diff --git a/src/jvm/clojure/lang/RT.java b/src/jvm/clojure/lang/RT.java
index 502f00d..2e6e01b 100644
--- a/src/jvm/clojure/lang/RT.java
+++ b/src/jvm/clojure/lang/RT.java
@@ -348,8 +348,7 @@ static public long lastModified(URL url,String libfile) throws Exception{
                }
        else
                {
-               File f = new File(url.toURI());
-               return f.lastModified();
+               return url.openConnection().getLastModified();
                }
 }