Description of problem:

The PHP version that is shipped with RedHat ES3 has a bug in thi GD
imagecopymerge function, making that function unusable.  This has been
fixed upstream.  Bug information is located here:

http://bugs.php.net/bug.php?id=23808

Version-Release number of selected component (if applicable):

# rpm -q php 
php-4.3.2-19.ent

How reproducible:

100%

Steps to Reproduce:

create a file called test.php in a websites document root:

<?php
$img = ImageCreateTrueColor(100, 100);
ImageFill($img, 0, 0, ImageColorAllocate($img, 255, 255, 255));

$img2 = ImageCreateTrueColor(50, 50);
ImageFill($img2, 0, 0, ImageColorAllocate($img2, 0, 0, 0));

ImageCopyMerge($img, $img2, 0, 0, 0, 0, 50, 50, 50);

ImagePNG($img);
?>

wget this php file, rename it to test.png , then xv it.
  
Actual results:

A black box

Expected results:

A grey box

Additional info:

Patches attached.