assuming bug 410192 will be fixed soon, still there is issue in [e4x.@a].toSource(); when we do to source of an e4x attribute the xml entities are not transformed to equivalent C style escaped strings. [(<a b="ddd ddd<>"><c>c</c></a>).@b].toSource(); before bug 410192 fix gives ==> [ddd&#xA;ddd&lt;>] Expected ==> ["ddd\nddd<>"] ie, it should be equivalent to [""+(<a b="ddd ddd<>"><c>c</c></a>).@b].toSource()

E4X will be removed again from Spidermonkey (bug 788293)