Element.match issues

[Idiosuite]

Hello everyone,
I am experiencing some issues using Element.match (Mootools Core
1.2.0) with two elements.
The docs says:
var el = $('myDiv');
$('myDiv').match(el); //Returns true

But when I do the exact thing I get this error in my firefox console:
Error: selector.match is not a function
Source File: http://localhost:8888/_apps/tabs/_inc/mootools1.2.js
Row: 2433

Of corse the dom is ready, the window is loaded, and the div 'myDiv'
exists.
It's driving me crazy. Is it a bug, or is it no more possible in
Mootools 1.2 and the docs are not up to date, or what?

Any suggestion is really appreciated.
Thank you very much

Giorgio