Description:
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Transparency is not working on PNG files on W2K.
I've tried a few background colors, different formats, but can't get it working.

Reproduce code:
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<?php

// Example demonstrating a transparent truecolor png bug
// fixed by the time of gd 2.0.11, but not fixed in php's
// bundled gd.

header("Content-type: image/png");

$image = imageCreateTruecolor(640, 100);

$transparent = imageColorAllocate($image, 0, 0, 0);
$red = imageColorAllocate($image, 255, 50, 50);
imageColorTransparent($image, $transparent);

imageFilledRectangle($image, 0, 0, 640-1, 100-1, $transparent);

imageString($image, 3, 0, 0, "If the background is black, and you aren't on win32 IE (buggy png code), this is a bug.", $red);

imagePng($image);

?>

Expected result:
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The code should produce a white PNG image with red text.

Actual result:
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The code produces a black PNG image with red text. The background is NOT transparent.