diff -r ed0c92c81ea4 -r fbf8eb98a8ef emul/src/main/java/java/lang/String.java
--- a/emul/src/main/java/java/lang/String.java	Wed Dec 05 09:28:31 2012 +0100
+++ b/emul/src/main/java/java/lang/String.java	Mon Dec 10 11:26:32 2012 +0100
@@ -1426,7 +1426,7 @@
      */
     @JavaScriptBody(args = { "self", "find", "from" }, body=
         "find = find.toString();\n" +
-        "return self.toString().substring(from, find.length) === find;\n"
+        "return self.toString().substring(from, from + find.length) === find;\n"
     )
     public boolean startsWith(String prefix, int toffset) {
         char ta[] = toCharArray();