Description:
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Within a function a reference to another variable cannot be assigned to its to a global variable.

I also proved this example in php 4.3.3

Sorry by my bad english

In spanish: Dentro de una funci?n no se le puede asignar a una variable global una referencia a otra variable (tambi?n global).

He probado este ejemplo en php 4.3.3 y php 4.3.4

Reproduce code:
---------------
<?php
	$a = 'a';
	$b = 'b';

	function f() {
		global $a, $b;
		$b = &$a; // Fails
	}

	f();
	echo $b;

	$b = &$a; // Works
	echo $b;
?>

Expected result:
----------------
aa

Actual result:
--------------
ba