arguments object and eval

Hi!

Maybe it's a wrong place to post, but I've tried to get any info through
dev-tech-javascript at lists.mozilla.org but the question was completely
ignored.

When using the folowing code:

function func() {
    var arguments = null;
    alert(arguments);
    eval("alert(arguments);");
}

func();

In all browsers it works as expected (both alerts give null), still with
SpiderMonkey first alert gives null but the second object. Even worse:

function func() {
    eval("var arguments = null; alert(arguments);");
    alert(arguments);
}

func();

First alert gives object and the second null. In the specification for ES3.0
I could only find that eval inherits the calling scope. Is there any
ambiguity in the specification that I'm missing and that Mozilla interprets
this way or is this just a bug of implementation? It definitely looks like a
bug, but I'm just curious if this is something I could expect to be fixed.

Thanx!
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I replied to Dan privately but wanted to update the list: this is just  
a SpiderMonkey bug, already fixed -- no need to bother y'all further.  
I'll get someone to followup on the right list.

/be