bug 528404 - disable e4x/XML/regress-324688.js due to random time outs, r=sayrer.

js/src/tests/e4x/XML/jstests.list

@@ -50,6 +50,6 @@ script 13.4.4.9.js
 script regress-291930.js
 script regress-324422-1.js
 skip script regress-324422-2.js # slow
-script regress-324688.js
+skip script regress-324688.js # bug 528404 - disable due to random timeouts
 script regress-336921.js
 script regress-376773.js