The altest 1.3rc1 breaks some of my existing code because the changes done in the selector.

From line 287:

`

if ( this.length === 1 && !/,/.test(selector) ) {

var ret = this.pushStack( [], "find", selector );

ret.length = 0;

jQuery.find( selector, this[0], ret );

return ret;

} else {

...

`