Description:
------------
I found this bug twice.
It always worked before, but with PHP 5.1RC1 and 5.0.5 these two scripts don't work:
In script I developed (you can see the function that cause error in the code below).
The error is:

Fatal error: Only variables can be passed by reference in ...

I found this bug in phpBB (last version) too, in the same server, when I try to post. This is the error:

Fatal error: Only variables can be passed by reference in C:\[...]\forum\posting.php on line 555

I'm using Windows XP Pro SP2, Apache2, PHP 5.0.5 (but this bug is in 5.1.0RC1 too). PHP is running as CLI

Reproduce code:
---------------
This is a code I wrote:

// Get filename and extension
function get_filename_parts($file)
{
	$extension = end(explode(".", $file));
	$filename = substr($file, 0, -(strlen($extension)+1) );
	return array($filename, $extension);
}

Now it works:

// Get filename and extension
function get_filename_parts($file)
{
	$split = explode(".", $file);
	$extension = end($split);
	$filename = substr($file, 0, -(strlen($extension)+1) );
	return array($filename, $extension);
}